General figures for the domestic rat from the MSD Veterinary Manual; the AFRMA standard sets no weight and says size does not disqualify. Wikipedia gives 300 g or more for a standard-sized male.
A fancy rat born with no tail at all. Without the long tail the outline looks quite different: the body can be shorter and more compact, and the hindquarters finish in a neat, rounded rump. Any coat type, colour or marking can be combined with taillessness.21
Tailless rats share the friendly, curious nature of other fancy rats. The AFRMA standard requires all show rats to be easy to handle, and these rats enjoy company, exploring and gentle interaction with their keepers.456
Daily activity how busy a day looks
Just as active and nimble as tailed rats and good climbers, so give daily out-of-cage time, toys and foraging. Because rats use their tails for balance, low platforms, ramps and soft landing areas suit a tailless rat well.156
Grooming and care the hands-on bits
Self-grooming, so no brushing or bathing is needed. Rats use their tails to shed heat, so keep a tailless rat in a cool, steady room and out of hot sun, and keep an eye on it in warm weather.153
Home where they are happiest
A roomy cage with plenty of floor space and lower levels, ramps, hammocks and hideouts, dust-free bedding such as cellulose or shredded paper, and a quiet spot kept at about 19-23 C, away from direct sun and draughts.735
Food basics what goes in the bowl
A complete rat nugget or pellet as the daily base, with small amounts of vegetables, a little fruit, grains and cooked egg counted into the ration. Save sweet or fatty bits for training rewards, scatter some food for foraging, and keep fresh water available from a bottle.8
Company who they like around
Highly sociable. Keep with at least one other rat, as a same-sex pair or small group or a neutered mixed pair, and offer daily time with people.65
The story where it all began
Rats without tails were first described in a research article in 1915. The trait is recessive, so it can surface unexpectedly in litters from tailed parents. American fanciers developed it as a show variety, and the AFRMA standardised the Tailless rat on 14 November 1993.12
Fun facts for the dinner table
1
The variety's other name, Manx, comes from the Manx cat, which is also known for having no tail.5
2
The earliest known written record of a tailless rat is a research article from 1915.1
3
Taillessness is recessive, so a tailless baby can appear in a litter from two tailed parents.1
4
Even without a tail, these rats climb about as nimbly as their tailed relatives.1
Recognised by the official bits
American Fancy Rat and Mouse Association (AFRMA)
Standardised on 14 November 1993. May be shown in any recognised colour, marking or variety; the defining feature is a complete absence of tail, and the body may be cobbier with a rounded rump.2
The care rhythm a typical week and year
A typical home-care rhythm for a Tailless Rat. A starting point, not a vet's advice.
Spot cleanevery day
Full cleanevery week
Play timeAt least an hour out of the cageevery day
Nails checkevery 3 weeks
Vet check-upevery year
Treats they will love homemade and simple
Hamster and Gerbil Fresh Veggie and Herb Mix
A simple, safe daily supplement that provides essential vitamins, hydration and enrichment for hamsters and gerbils.
You need
1 small piece of carrot (about the size of a pea)
1 small piece of broccoli (about the size of a pea)
1 small piece of cucumber (about the size of a pea)
1 small piece of apple (without seeds, about the size of a pea)
1 small leaf of basil or parsley
How
Wash all fresh ingredients thoroughly.
Cut the carrot, broccoli, cucumber and apple into pieces no larger than a pea.
Tear the herb leaf into tiny pieces.
Mix all ingredients together in a small bowl.
Offer a total of 1.5 to 4.5 teaspoons of this mix per day, depending on the size of your pet.
How much: 1.5 to 4.5 teaspoons per day for hamsters and gerbils
Not veterinary advice. Check with your vet first if your pet has allergies, a health condition, is on a special diet or is pregnant. Treats should stay a small part of the daily food. Cut to a safe size and supervise. Terms of use
Owner questions the things everyone asks
How often should I feed my Tailless Rat?
Feed your Tailless Rat a complete rat nugget or pellet every day as the base, and add small amounts of vegetables, fruit, and grains. For exact amounts, check the food label and ask your vet.8
What should a Tailless Rat eat, and which foods are dangerous?
A daily base of rat nuggets or pellets, plus small portions of vegetables, fruit, grains, and cooked egg. Avoid dangerous foods like chocolate, caffeine, grapes, raisins, onion, garlic, and xylitol; see the full list from the ASPCA.89
Should I bathe a Tailless Rat?
No, Tailless Rats are self-groomers and do not need baths. Keep them in a cool, steady room and watch for overheating since they lack a tail for heat regulation.153
Does a Tailless Rat need brushing?
No, Tailless Rats groom themselves and do not require brushing.153
How do I look after a Tailless Rat's nails and teeth?
Furry Diary's starting plan is to check nails every three weeks and trim if needed. For teeth, provide safe chew toys and ask your exotic-pet vet if you notice overgrowth. Pet Wiki plan
How much space and exercise does a Tailless Rat need?
Give a roomy cage with lower levels, ramps, and soft landings, plus at least an hour of supervised out-of-cage time daily. Include toys and foraging to keep them active.1567Pet Wiki plan
Should a Tailless Rat live alone or with friends?
Tailless Rats are very social and should live with at least one other rat, ideally a same-sex pair or small group. Also give them daily interaction with you.65
How long does a Tailless Rat live?
Lifespan varies; fancy rats typically live 2 to 3 years. Ask your breeder or vet for more specific information.
Is a Tailless Rat a good pet for children?
Tailless Rats are friendly and gentle, making them suitable for older children who can handle them carefully. Always supervise interactions to keep both safe.456
How do I hold a Tailless Rat?
Support your Tailless Rat's whole body with both hands and let it feel secure. Approach calmly and let it sniff you first for a positive experience.456
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.
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