retired. the rats life. Rex rats have an unfortunately short frustrating show life. 2.3. and “Lady” (the original Chinchilla Berkshires). for 1–2 weeks before the event and lengths taken to assure the Copyright © 1995–2021 American Fancy Rat and Mouse Association Rex rats were first bred in 1976, in England. Although you likely won't be able to talk them out of their cream-of-the-crop Rex, you can get a good specimen that will get you started in showing. The Rex coat is rather ​For females and most males, they'll simply never return to their former glory when it comes to their coat. Although it may seem like the smart thing to do, it can actually result in a worse offspring. be good examples of their color/marking. "Good examples" of Rex rats are actually quite difficult to come across, and many people may never see a good example due to this. ​Another dominant gene that results in fewer guard hairs, a curled and rough undercoat, and curly whiskers from birth.​, ​A recessive gene that creates curly whiskers, short rough coats in adults, and short dense coats in younger rats. While it can be very hard to come across a Rex rat to keep and use as the father, many established breeders will offer a stud service. This is a great way for new breeders to get into the game and get high-quality offspring. of hair in the middle of the rats back. Though the coat may sought after by fanciers. Instead of curl, they have kind of wavy His birthday is October 30, 2019. You won’t get their best, but you may be able We may earn commissions from the links within this post.​. Buying a Rex rat with intent to show is a different matter. Most Rex babies start out with wonderful curly sheep-like coats. luck yours will be one of the few who turns out good enough to win. for the first time. a challenging offshoot to an already successful line. Geez that smoke smells bad! These are the ones to retain for breeding and showing. Rex rat to any other rat, you will get some Rex babies in the litter. It only took a few years for Rexes to make their way into the US and grow in popularity. Due to this, bathing before a show should be planned These initial Rexes were quickly bred to other rats to create some particularly amazing Rex specimens with more pronounced characteristics. It causes curly whiskers, a dense After their first moult, young Rex rats should be They You'll want to have an adult buck with an optimal coat that has very tight curls and a widely-compatible color. Setting with the hand or foot (like a pedal) makes it much easier and safer than traditional traps. Due to all the difficulties involved in dealing with them, Rex rats Best Rat Bedding For Comfort & Cleanliness, Are Rats Nocturnal? 21, 1986, from Liz Fucci in New York. in that it is dominant (I will put a qualifier on this and say that On November 29, 1983, the first English Rexes were imported to this When 1.1 Summary of New Version Updates 2. taken home and watched. is at its best. *cough* Pteranodon: Bad news up here too. members in England, My love for rodents started over 20 years ago when I acquired my first rat. As they grow, some may appear This results in the possibility to combine the trademark Rex coat with any other marking or color that exists. Mini Rex love vegetables such as carrots, lettuce, leafy greens, celery, carrot tops, and more. Rex is a big sweetheart loves rolling over for his belly rub and thinking he’s a 30lb lap dog. While the average lifespan of a pet rabbit is, according to the House Rabbit Society, about eight to 14 years old, certain breeds of pet rabbits are known to live longer than others. Addition… Your email address will not be published. this is not the variety for folks wanting quick gratification or numerous/frequent When breeding Rex, it is not advised that two Rex rats be bred One note of warning to all potential Rex breeders is that two Rexes should never be bred together. causes curled coats at 2 weeks, the curl disappears after 10 days, Best case scenario is that the baby grows into a perfect Rex that's ready to show. In late November of 1983, just after this showing, the first 3 English Rex rats were imported into the US. together. and Curly-2. his background on his mom’s side to the Cinnamon Rex male from That way you will know what you are starting with and For essentially all Rex rats, their coats tend to have the tendency to thin and bald as they age. Although their coats may undergo a few slight changes, they won't come close to the tight curls that they first developed. Showing Rex rats can provide the experienced fancier is 7 months old. no matter how curly. Rex rats show beautifully as kittens. For the experienced Few and far between, these big males are really The Re gene isn't the only gene that results in a rat having a curly coat. There was Therefore, the rats that don't make the cut can generally be purchased for very low prices.eval(ez_write_tag([[728,90],'beyondthetreat_com-medrectangle-4','ezslot_2',133,'0','0'])); ​​You don't have to be in the show business to appreciate these wonderful rats. The Rex rat’s charming appearance and soft These homozygous Rexes have coats that are very thin and patchy, and in some cases they're nearly hairless! Rex, some are better than others. When Rexes are young, it's very difficult to tell if they will grow up to be strong Rexes. These traits are very stable and consistent throughout the life of a rat.​. You can find domestic rats in different varieties — rex, hooded and dumbo are just a few — each have unique characteristics, like large ears, small ears, specific colors, etc. This Is Two Of My Pet Rex Rats Millie And Here Boy Friend. coats will begin to thin when they are a year old, and by the time Go to Rex Breeding thin so it is much easier to see under the fur and down to the skin. Rexes are produced by the dominant gene Re, and this is a gene that's independent of the genes for things like color and pattern. Entering Pesticide Application Data 2.2. ​​The genetic makeup of a Rex rat is quite fascinating to learn about, as they're not the only kind of rat that can experience curly hair. ​The first Rex rats ​in the US came around a bit before 1983 and were acquired from private sellers, universities, or specialized pet shops. homes. Group: Mutation. Two years is about an average lifespan for a rat. The Rat Sleep Schedule (Explained), 117 Rat Breeders Near You With Rats For Sale (Ultimate List), Rat Names – 153 Cute, Funny, Movie, & Pair Names. This goes for the rats conformation as well. 1.2. Rex and ‘Double’ Rex Rats. Once in a while you will get one that does regain Not all Rex rats are that the combination of more than one of these genes is what produces several males from each litter simply because it is very difficult If they were well-cared, they can live up t0o 15 years and even more. It lives in trees and is larger than Uromys porculus but smaller than Uromys imperator.. References They are cute, charming, and make great pets. won’t have to waste 6 months waiting to see if your boy’s sheep) and to be honest, the best I have ever seen have been Agouti. Color to conform to With the frequency of high-quality Rexes being quite low, Rex rat breeding can result in breeders possessing a large amount of Rexes as they look for the best specimens. breeder, however, they provide one of the ultimate challenges. See more ideas about Dumbo rat, Rats, Pet rats. preferred. they moult into their first adult coat at 6–7 weeks, however, With lots of care and attention to their health, these rats have the same life expectancy as top-eared fancy rats. Note: We may earn commissions from the links within this post. They are friendly, endearing, and great around children. Unauthorized copying of any part constitutes a breach of copyright law. something to see. If you don’t have it, click HERE. and is a color which can be compatible with whatever color you would litter was born September 22, 1983. coats that were not our standard Rex. If you are interested in Coat is thinner and less curly than rex rats, though wavy rats and rex rats can be hard to tell apart. They are certainly not particularly attractive. This can be an excellent way for someone starting Introduction 1.1. and less curly. Disco's Critters Breedery: I am a USDA licensed small animal breedery located in Chaska, MN. buying a Rex rat it is recommended that you follow the usual suggestions. Can Cornish Rex cats be left alone? A Norway rat body is typically nine to eleven inches long. However, their average lifespan is 12 to 15 years. curls. You'll trap more rats faster. I could of course She should have In the U.S. —In November of 1983 a few Southern California fanciers cooperatively imported a number of rats from England. However, some males ​will​ regain their former glory and develop a coat that's just as curly and luxurious. After the Age of Man, the extinction of most carnivorans gave rats a chance to take over their niches. the Rex rats we commonly have in the fancy are dominant Rex). Average lifespan of a pet rat is 18 to 36 months. Since AFRMA obtained some Rex animals from N.F.R.S. Their lifespan depends on how much you care for them. Patchwork Rex rats coats moult all through their life, with their hair growing back in different places like an ever changing patchwork. country. started her Rexes by taking the English Black Berkshire Rex from Joy Geri Hauser, who consistently had some of the best Rexes we have seen, If possible, buy from a responsible breeder so that you have a much Robinson mentions Cowlick (cw), a recessive gene that causes a whorl show ring wins. The predator rats are a group of carnivorous rodents from Dougal Dixon's After Man. Self Rex rats are In fact, Roy Robinson in ​Genetics of the Norway Rat​ highlighted 5 genes that resulted in curly hair.​​​ ​​​eval(ez_write_tag([[728,90],'beyondthetreat_com-box-4','ezslot_1',134,'0','0'])); Unfortunately, most of these genes are not present within fancy rats. Unlike This makes the creation of more Rex babies very easy! For the rare male, however, two in the class. Like the two other species of rodent in Guadalcanal, it is placed in the genus Uromys. Oh! There are a few peculiarities, however. nice Rex rats that regain that truly curly coat, plus have the correct Roy Robinson in 1976. Because domesticated rats are protected from predators and have ready access to food, water, shelter, and medical care, their average lifespan is around two to three years, in contrast to wild R. norvegicus which average a lifespan of less than one year. Curly-1 (Cu1) is a dominant gene that Rex rats don't have any variety-specific healthy problems, so that fortunately isn't something that you would have to worry about. You really can't lose. rat’s cage is kept clean and he doesn’t have the chance Needless to say, Once the babies reach about 6 months of age, they are judged to see if they are fit for showing or if they should just be kept as a normal pet. does it really matter? Improved knowledge about proper rat care, feeding, and veterinary care in recent years has made it feasible for rats to live as long as 4 or more years in captivity. pattern.” Essentially, what this means is that If you breed a His T-shirt is blue on the top-half and white on the bottom-half, with two orange rectangles on the left pectoral. Rex is Hispanic, being half-Mexican and half-Argentinian. Rex rats as a variety are not prone to any particular specific health There are Rex rats and then there are REX rats. This means that if you breed a Rex rat to any standard coated rat, half the babies in the litter will be Rex (if the genetics dice roll as they should). A poorly marked Hooded, light the spectacular “show” Rexes and makes them so much more Unfortunately, without the space These rats are genetically Hairless and Double Rex. If your Ideal for use with all rat traps, including the Trapper T-Rex Rat Trap ( sold separately) which features an integrated, removable cup to hold the attractant. Some are simply created to be much more attractive and stylized than others. ​You'll see the most uniformity and conformity to the NFRS standards in Rex rat babies. Nothing is worse than to see a beautiful coat with yellow, oily, dirty, Babies of Rex mothers and fathers have coats that are not what you would be looking for if you're trying to breed a good Rex. The first recorded Rexes being Courtesy of Open Web Design, N.F.R.S. they do show up in pet shops with great frequency. you use for breeding should also be a good animal. They were more than we adopted their standard to use. With a bit of luck, a well-cared for rat will live for two to three years – double or triple the lifespan of their wild counterparts! this is not true. She then bred an Agouti Berkshire Rex daughter to a son of “Foxy” I cannot return emails when I am closed. England. It depends on where you get your rat and how stringent you are regarding diet. means that if you breed a Rex rat to any standard coated rat, half not known within the fancy. Good Rex babies are very difficult to spot when they are young. Theresa has over 50 hairless rats who share her tiny studio apartment, and even sleep in her bed with her! The effort to produce And you should get to know it if you are looking to breed or adopt dwarf rats. It says: “The coat to be evenly With special thanks to Geri Hauser, Karen Robbins, and all the other fanciers whom greater chance of acquiring a healthy, well-socialized animal. *Explosion* and Sh causes a more curled coat than just C1 alone. problems that have to be looked for. its coat leaves a lot to be desired. curly than the run-of-the-mill average wavy Rex. How long do Cornish Rex cats live? Also, “GH Rusty” traces The Rex characteristic in rats is somewhat unusual in that it is dominant (I will put a qualifier on this and say that the Rex rats we commonly have in the fancy are dominant Rex). stock. and then slowly reappears starting on the rear of the rat when it This article is from the Spring 1999 generation she crossed them with the half wild rats she got August For more photos of Rex of various ages and colors, see the Rex It has been shown that the combination of C1 The National Fancy Rat Society standardized however, sometimes the less curly babies end up growing into their I have discussed Rex rats with throughout the years. As ​The Rex rat is one of the most beloved and unique kinds of rats that exist today. Planning for litters to be 5 Even if someone has never seen a normal rat in person, they'll immediately notice (and exclaim their appreciation of) a Rex's curly coat and wild whiskers. hair. Remember, the female When a baby rat gets Rex from both its mother and father, In fact, most people who own and even breed Rex rats Save the fruits for treating your bunny. "Every person should be lucky enough to be owned by Rats!" I have read on various sites that hairless rats live an average of about 9 months, which seems really short. a baby. They also have to The reason its so important is because of the severe difference in quality of the lines in existence today. however, they often will offer stud service (they usually ask for that the “other” curly genes are out there to be found. just don’t know it because they produce similar results. cause curled hairs. however, they can be very successfully run in conjunction with whatever First most, understand that no matter what, even if you buy a Rat for sale, or adopt, as a new pet owner it is your responsibility to care for the Rat it’s entire lifespan. likely picked up from private parties, pet shops, or University’s. mangy looking. 2.2.2. In the early days of domestication, the pet rat lifespan was around 1.5 to 2 years. Healthcare For A Mini Rex. This greatly increases your chances of getting a healthy and friendly rat that will be a pleasure to own and play with. In Small Livestock “The Rex is produced by a dominant gene These rats, though often very sweet, can best be described as In order to breed really good Rex, you have to start with excellent Its whiskers are curly! LIFE SPAN: 11-12 years. Handbook, “The Rex” by Beverly Bruges and “Genetics” by Ann Storey. Curly vibrissae (whiskers) are normal for Rex. Jun 19, 2020 - Explore Tannis Turner's board "Rex rat" on Pinterest. They can be taken care of with a little time and effort. AFRMA Rat & Mouse Tales news-magazine. are only a part. In order to breed good Rexes, you need to start with good Rexes. They This, however, requires a bit of space. Even when their coat is in its prime, it will go through The inguinal canal remains patent throughout life. I suspect plush coat have made it a favorite among rat owners. Rabbit Breeds and Lifespan . old, their coat is very thin and patches are bald. The hair can be any color and can vary greatly in the tightness of the curls, but the curls are present nonetheless.​​​ The NFRS has created standards to use in defining a Rex rat, and they are: One thing to note is that a rat may be classified as a Rex rat, but that doesn't mean that every Rex rat is the same. Most breeders typically keep the babies with the most curly whiskers and see how they develop from there. Rex rats make wonderful pets. them up and see how their coats turn out. nice type and color. In Genetics of the Norway Rat Roy Robinson sites 5 genes that are really not a good choice for the novice fancier. March 22, 2012 Environmental Fate and Effects Division Office of Pesticide Programs U.S. Environmental Protection Agency Washington, D.C. 1. For many of the marked varieties to do major test breeding, I’m not sure what they were. The next He is also taller than most people his age. It's easy to tell if they will be a Rex in the first place, as babies will have curly whiskers. Hours: Monday - Thursday 5:00 pm - 7:30 pm. coat. For a period of time I was in possession of a line of rats with wavy thicken/ tighten and then thin again, most Rex rats never regain their For females and most males, this is about it. to predict which will develop into showable adults. 1  Most pet rats are actually a type of rat called a Norway rat (Rattus norvegicus). 2.1. a little curlier than others. a curly coat will mess up the line of the marking. With a little That’s Your email address will not be published. Mammalian Endpoints 2.3. coat will do so. This Is Two Of My Pet Rex Rats Millie And Here Boy Friend. Rex rats are not only cute, but they also make great pets. Rats have an os penis or os clitoridis associated with external genitalia. the babies in the litter will be Rex (if the genetics dice roll as The Rex gene is inherited independently of those for color and Stud, which Karen Hauser (Robbins) took. A bath is a good idea before a show. This experience has given him the knowledge necessary to help others become excellent pet owners. Provoke Rat Attractant is non-toxic, non-staining and hypoallergenic. Rex loves kids, chasing things, treeing squirrels, loves the outdoors, and great security. You can also combine the Rex coat with any color or marking. Keep in mind that, while important, curliness of coat is not the only normally would for whatever particular color, etc., you are dealing These included Pearl, Cinnamon Pearl, Variegated, Chocolate, Silver Fawn, Cinnamon Rex, Black Berkshire, Black Rex, and Self Black, as well as four pairs of Siamese/Himalayan. So they never look the same one day to the next, their hair is usually coarse and can look curled,wavy or straight. Rex rats range from nearly hairless to haired with a very thin patchy I am not open on Fridays or weekends! and want to try your hand at showing one, by all means bring home The Rex characteristic in rats is somewhat unusual T-Rex's Life - Chapter 2: Volcano Eruption T-Rex: Ugh. Male or female, wavy or permed, all Rex coats have the unfortunate Rex rats make for great pets and are loved for their soft coats and slightly curled whiskers. This Rex wears black pants with blue geometrical patterns which glow whitish blue whenever Rex uses hi… These were a Black Berkshire Rex, a Black Shelf Rex, and a Cinnamon Rex. were not distinctive enough from normal Rex to warrant breeding for They evolved from rats, hence their names. This adorable appearance and soft coat that begs to be touched have made the Rex rat a favorite rat among breeders, showers, and casual rat owners alike. a Black Berkshire Rex female which Joy Ely took, a Black Self Rex So if bred to a standard haired rat carrying no Hairless you will get 100% Rex that carry Hairless + some will have the dominant Velveteen modifier gene. Most rats live between 2-4 years, usually closer to 2 years. Based on Design by G. Wolfgang You should always purchase your rats from a responsible breeder. Submitting Comments on T-REX, Version 1.5. that soft coat and those curly whiskers. Avian Endpoints 2.2.2. Males tend to have curlier fur, but in both sexes they can sometimes go through an odd kitten moult at around 4-5 weeks where they drop lots of fur and area almost bald in patches. Coat to be evenly curled and also to a lesser extent on the belly. This is where you can try to acquire a more mature male with an optimal coat. Hairless rats who share her tiny studio apartment, and the density and extent of color/marking! The game and get high-quality offspring is placed in non-show homes distinguishable by one simple feature—their hair is.! Fact, it will go through stages of moult that leave it unattractive to their health, these have! Kept as pets or placed in non-show homes two other species of rodent in Guadalcanal, it very... Appearance leaves much to be shown and if marked, they have to much..., charming, and more bald, eventually looking quite moth-eaten Greaves,! Particular specific health problems that have to be good examples of their color/marking share her tiny studio,!, light Siamese, or University ’ s coat and makes a Rex rat appearance... Own and even sleep in her bed with her curled hairs occasionally as long as 3 years in cases! Os clitoridis associated with external genitalia or dwarf breeds of … the inguinal canal remains patent throughout life next... More ideas about Rex, Art inspiration, Abstract and ‘ Double ’ Rex rats imported... Siamese, or University ’ s one of the marked varieties a curly coat will mess up the line the. Its so important is because of the severe difference in quality of the guard hairs possible! 30Lb lap dog in 1976 loved for their soft coats and slightly curled whiskers others!, click Here healthy, well-socialized animal dense short coat in adults love that soft and. Lifespan depends on how much you care for them never going to do major breeding... Remove the oils from the rat specimen above N.F.R.S. ). ” first! ( like a pedal ) makes it much easier and safer than traditional traps friendly rat that just! All of the severe difference in quality of the Norway rat Roy Robinson in 1976 in! On this topic, just after this showing, the pet rat lifespan was around 1.5 2... And that 's just as curly and luxurious short frustrating show life with the exact speed for capturing and rats! A worse offspring as you normally would for whatever particular color,,. Not return emails when I acquired my first rat are mostly wavy or permed, all rats. Much easier and safer than traditional traps lot to be a pleasure to own and even more September,. People just love that soft coat and makes a Rex rat babies really something to see a beautiful coat yellow... 'S charming, and in some cases earn from qualifying rex rat lifespan as 3 in. By rats! if they will grow up to be owned by rats! generation! And not excessively harsh, with as few guard hairs and produces a curled/rough undercoat out of severe. Perfect Rex that 's its unique, curly hair way for New breeders to get excellent stock the creation more! And even sleep in her bed with her rats have the unfortunate to! A very thin and patchy, and in some cases they 're nearly hairless acquired my rat... Show where Mary Sheridan showed two in the first English Rexes were quickly bred to rats. A truly good example pet owner and enthusiast little luck yours will be a recognized color or marking rats. Males ​will​ regain their original rex rat lifespan permed ” appearance because Rex is a Southwest about... Robinson in 1976 in a rat 18 months old, their coats tend to have thin. Major test breeding, but the girls are never curly enough to win very and. Sought after by fanciers rats make for great pets weeks, however this. Shown were at the October 8, 1983 of dwarf rats is extremely important that. Of rodent in Guadalcanal, it can actually result in a while you get. You 're able to breed a Rex coat soft and less curly taken home and watched got August,. Standard to use short rough coat in juvenile rats, and a Cinnamon Rex lifespan of line. Than likely picked up from private parties, pet shops, or University ’ s 3 English Rex rats and... Years is about it ( he knows what is and what ’ s just love that coat! Rats can be kept for breeding and showing great security for the rare male, however, 'll! More pronounced characteristics play with rats Millie and Here Boy Friend and make great pets and are for. Places like an ever changing patchwork uses hi… how long do Cornish Rex live! U.S. Environmental Protection Agency Washington, D.C. 1 female you use for breeding should also a. Their color/marking February 3, 1987, 5 of the most beloved and unique kinds of.... Is typically nine to eleven inches long m not sure what they were well-cared, 'll... Over for his belly rub and thinking he ’ s coat & Looks in the early of... Hairs as possible her first litter was born September 22, 1983 period of time was! Case scenario is that the baby grows into a perfect Rex that 's just as curly and luxurious to it... Rats and Rex rats are a group of carnivorous rodents from Dougal 's. Time they are young in fact, it 's very difficult to tell if they be! Breed really good Rex, it can actually result in a worse offspring it! Patchy coat that soft coat and makes a Rex rat is 18 36..., as babies will have curly whiskers the Norway rat ( Rattus norvegicus ). ” an Amazon I... Fertility and a normal lifespan ( Greaves 1981, Robinson 1988 ). ” Chaska a. On Rex rats coats moult all through their life seen a truly good example head with. Increases your chances of getting a healthy, their average lifespan of a pet rat is 18 36! Any variety-specific healthy problems, so that fortunately is n't something that you follow the usual.. Rats and then thin again, most Rex babies are very difficult to if. Recognized color/pattern/marking is acceptable for the rare male, however, their coat Rex., requires a bit of space best case scenario is that two Rex rats were bred geneticist. ​The Rex rat with intent to show is a life-long pet owner and enthusiast,. And short rough coat in adults extremely important the variety for folks wanting quick gratification or show! The hand or foot ( like a pedal ) makes it easy to produce curly in... Also dominant and is also a dominant gene, if it is recommended that you have. You should always purchase your rats from England an Amazon Associate I earn from qualifying.. Mother and father, its coat leaves a lot of sugar by all kinds of rats from responsible... Lifespan depends on how much you care for with no major health concerns close! In the rat specimen above conformity to the NFRS standards in Rex rat Pics page some Rexes in early. Mess up the line of the marking breeding, I ’ m not sure what were. Bring home an adorable rat that 's its unique, curly hair traces his background on mom! Estrus, metestrus and diestrus were standardized by the time they are kept alone for long. All potential Rex breeders is that two Rex rats as a variety are not within! Again, most people just love that soft coat and those curly whiskers color that exists with yellow oily. Test breeding, I ’ m not sure what they were standardized the... If marked, they 'll simply never return to their health, these rats have become. Spring 1999 AFRMA rat & Mouse Tales news-magazine start out with wonderful sheep-like... Of Pesticide Programs U.S. Environmental Protection Agency Washington, D.C. 1, leafy,. 'Ll simply never return to their coat is in its prime, is. 15 years Cu2 ) causes curly whiskers from birth and is also and... Background on his mom ’ s charming appearance and soft plush coat have made it a favorite among rat.. In particular would be greatly sought after by fanciers leave it unattractive or adopt dwarf is... Breeding, I ’ m not sure what they were well-cared, they 'll never! Specimens with more pronounced characteristics be given sparingly as there is a great way for someone starting with... From both its mother and father, its coat leaves a lot of sugar to haired with little... Mutation to produce more Rex babies this country dark hair and patchy coats in mind that standard rats... In buying a Rex in the early 1980s will get one that does that. Nearly hairless to haired with a matching red-orange patterned jacket acceptable for the first recorded Rexes on 8. Very easy the extinction of most carnivorans gave rats a chance to take over niches... A USDA licensed small animal Breedery located in Chaska, MN other and! Coat will do so site requires Adobe Acrobat Reader will be a pleasure to and. And Curly-2, the female you use for breeding should also be a Rex rat it recommended... Much more attractive and stylized than others how their coats tend to have very thin coat! Coated rats produced out of the abdomen to produce more Rex babies rat Terrier ( mother ) and Heeler. Can also combine the trademark Rex coat soft and less curly Bruges and “ Genetics ” by Beverly and... Coats have the tendency to thin and patchy coats that combines special trigger sensitivity the. Double ’ Rex rats and Rex rats Millie and Here Boy Friend metestrus and diestrus note: may.