Furry Diary

Hairless Rat

Rattus norvegicus domestica

Also called Hairless fancy rat, True hairless rat

Recognised breedShort profile

From Several hairless mutations have been recorded in laboratory rats and fancy lines; the fancy variety was standardised in the United States by AFRMA in 1994.12

At a glance the quick version

Weight, male0.45 to 0.65 kg3
Weight, female0.35 to 0.45 kg3
Length20 to 25 cm4
Sizesmall

General figures for the domestic rat species from the MSD Veterinary Manual; club standards set no separate weight for this coat type, which shares the standard fancy rat body.

Striking bare-skinned look with very large ears
Thin, bright skin that still shows the rat's colour and markings
Friendly, curious fancy rat personality
125

Coat and looks how to spot one

Hairless (bare skin)

A hairless rat shows thin, bright, slightly see-through skin, which can be any colour and carry the usual markings. Some wrinkling is allowed, the ears are especially large and smooth, and the whiskers are very short and curly or missing altogether. Fanciers separate true hairless rats, which lack whiskers, from the double rex type.12

Coloursany recognised colour or marking, shown in the skin1

Personality what they are like

Hairless rats share the gentle, inquisitive nature of other fancy rats and become very tame with daily handling.25

Daily activity how busy a day looks

As lively as any fancy rat. Most active around dusk and through the night, it needs daily supervised time out of the cage, things to climb and forage for, and short play or training sessions.56

Grooming and care the hands-on bits

With no coat to groom, care is about comfort: soft bedding without sharp edges, a warm, draught-free room and gentle handling, plus plenty of soft nesting material and hammocks to curl up in.126

Home where they are happiest

The largest multi-level rat cage you can fit, with shelves, ropes, ladders, hammocks and hideouts, dust-free bedding such as shredded paper, placed in a quiet room around 19-23 C away from direct sun and draughts.63

Food basics what goes in the bowl

A complete rat nugget or pellet as the daily staple, with small portions of vegetables, a little fruit, grains and cooked egg counted into the ration. Keep sugary or fatty bits for training rewards, scatter some food to encourage foraging, and provide fresh water from a bottle at all times.7

Company who they like around

A very sociable animal that should share its home with at least one other rat, in a same-sex pair or small group or a neutered mixed pair, and enjoys daily time with its people.52

The story where it all began

Research papers since the 1950s have described several different hairless mutations in laboratory rats, including the Charles River hairless rat. Fanciers took up hairless rats as pets, and AFRMA wrote a show standard for them in 1994.12

Fun facts for the dinner table

  1. 1

    The AFRMA standard allows wrinkling and calls for very large ears.1

  2. 2

    A true hairless rat can be told from a double rex because it has no whiskers.2

  3. 3

    Australia does not allow foreign rodents to be imported, so hairless rats are not found there.2

  4. 4

    The skin of a hairless rat still shows colour and markings, so you can have a hooded hairless.1

Recognised by the official bits

American Fancy Rat and Mouse Association (AFRMA)
Standardised on 9 October 1994 as one of AFRMA's seven varieties; the ideal is as hairless as possible, with thin, bright, slightly translucent skin.1
Rat and Mouse Club of America (RMCA)
Hairless is one of the four RMCA varieties.8

The care rhythm Furry Diary remembers it for you

A typical home-care rhythm for a Hairless Rat. It is our own starting plan, not a vet's advice, and you can change every line in the app.

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Where this comes from

Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at support@furrydiary.app and we will fix it.

  1. AFRMA Fancy Rats - Varieties afrma.orgused for recognition, standard date, skin and whisker description, colours, research history
  2. Fancy rat - Wikipedia en.wikipedia.orgused for two hairless types, whiskers, Australia fact
  3. MSD Veterinary Manual - Description and Physical Characteristics of Rats msdvetmanual.comused for weight, lifespan
  4. AFRMA Rat Standards afrma.orgused for recognition, body type, body length
  5. RSPCA - Rats rspca.org.ukused for lifespan, temperament, social needs
  6. RSPCA - Rat environment rspca.org.ukused for housing, temperature, enrichment
  7. RSPCA - Rat diet rspca.org.ukused for diet basics
  8. RMCA Rat Standards rmca.orgused for recognition

Checked 2026-09-30. Text is written in our own words from these sources.