Furry Diary

Harley Rat

Rattus norvegicus domestica

Also called Harley, Long-haired rat

Rare breedShort profile

From United States: first found in a pet shop on 1 September 2002 by Debbi J. Needham of Odd Fellows Rattery, Washington.1

A friendly guide, not veterinary advice. For anything about your pet's health, ask your vet.

At a glance the quick version

Weight, male0.45 to 0.65 kg2
Weight, female0.35 to 0.45 kg2
Length20 to 25 cm3
Lifespan1.5 to 3 years42
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.

Distinctive long, wispy coat with a satin-like shine
One of the few long-haired rat coats
Friendly fancy rat temperament
154

Coat and looks how to spot one

Long, fine, wispy coat

The Harley has a light, airy coat of fine, wispy, long straight hairs without a dense undercoat. The fur has a shine reminiscent of a satin, and the whiskers are fine and delicate.15

Personality what they are like

Like other fancy rats, a Harley is typically sociable, curious and affectionate with the people it knows.54

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.46

Grooming and care the hands-on bits

Rats groom themselves, so the fine Harley coat does not need brushing; handle gently and keep bedding clean and dust-free so the light coat stays tidy.146

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.62

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.45

The story where it all began

The Harley coat turned up in a pet-shop rat in Washington State in 2002 and was taken on by Debbi J. Needham of Odd Fellows Rattery. It behaves as a recessive trait and remains an unrecognised, rarely seen coat type.1

Fun facts for the dinner table

  1. 1

    The very first Harley rat was spotted in a pet shop in 2002.1

  2. 2

    Its coat shines in a way AFRMA compares to the Satin.1

  3. 3

    The Harley coat is recessive, so both parents must carry the gene for babies to show it.1

Recognised by the official bits

American Fancy Rat and Mouse Association (AFRMA)
Listed among AFRMA's non-recognized rat coats; not standardised.1

The care rhythm Furry Diary remembers it for you

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

Tell me when it launches

Owner questions the things everyone asks

How often should I feed my Harley Rat?

Offer a complete rat nugget or pellet daily as the staple, plus small portions of vegetables, fruit, grains and cooked egg. Scatter some food to encourage foraging and always provide fresh water from a bottle.7 Furry Diary plan

What should a Harley Rat eat, and which foods are dangerous?

Feed a complete rat nugget or pellet daily, with small amounts of vegetables, fruit, grains and cooked egg. Avoid dangerous foods like chocolate, caffeine, alcohol, avocado, citrus, grapes, raisins, onion, garlic, raw meat, raw eggs, and xylitol.78

Should I bathe a Harley Rat?

Rats groom themselves, so bathing is not needed. Keep the bedding clean and dust-free to help the fine coat stay tidy.146

Does a Harley Rat need brushing?

No, the fine Harley coat does not need brushing. Handle gently and keep the environment clean.146

How do I look after a Harley Rat's nails and teeth?

Check nails every three weeks and trim if needed, but ask a vet or good breeder for guidance. Provide safe chew toys to help wear down teeth naturally.6 Furry Diary plan

How much space and exercise does a Harley Rat need?

Provide the largest multi-level cage you can fit, with shelves, ropes, ladders, hammocks and hideouts. Give daily supervised time out of the cage for at least an hour, plus things to climb and forage.62 Furry Diary plan

Should a Harley Rat live alone or with friends?

Harley Rats are very sociable and should live with at least one other rat, in a same-sex pair or small group, or a neutered mixed pair. They also enjoy daily time with their people.45

How long does a Harley Rat live?

The typical lifespan is 1.5 to 3 years, so enjoy your time together and provide good care throughout.42

Is a Harley Rat a good pet for children?

Harley Rats are sociable and affectionate with people they know, but they need gentle handling and supervision. They can be good for older children who understand their care needs.54

How do I hold a Harley Rat?

Support the rat's body gently with both hands, letting it feel secure. Always handle calmly and avoid sudden movements. For specific techniques, ask a good breeder or vet.4

Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Furry Diary's own starting care plan. A friendly guide, not a vet's advice.

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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 - Non-Recognized Rat Coats afrma.orgused for origin, status, coat description, genetics
  2. MSD Veterinary Manual - Description and Physical Characteristics of Rats msdvetmanual.comused for weight, lifespan
  3. AFRMA Rat Standards afrma.orgused for recognition, body type, body length
  4. RSPCA - Rats rspca.org.ukused for lifespan, temperament, social needs
  5. Fancy rat - Wikipedia en.wikipedia.orgused for long straight wispy hairs
  6. RSPCA - Rat environment rspca.org.ukused for housing, temperature, enrichment
  7. RSPCA - Rat diet rspca.org.ukused for diet basics
  8. ASPCA: People foods to avoid feeding your pets aspca.orgused for owner questions
  9. VCA Animal Hospitals: Feeding times and frequency for your dog vcahospitals.comused for owner questions
  10. ASPCA: Dog grooming tips aspca.orgused for owner questions
  11. ASPCA: Cat grooming tips aspca.orgused for owner questions
  12. RSPCA: What to feed your rabbit rspca.org.ukused for owner questions

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