American Fancy Rat & Mouse Day

American Fancy Rat & Mouse Day is observed on November 12. It’s a day to appreciate fancy rats and mice, the domesticated varieties often kept as pets, and to learn what they need to live well. The name “fancy” refers to selectively bred animals kept for companionship or exhibition, rather than a particular look or care routine.

How the day started

The exact origin of American Fancy Rat & Mouse Day isn’t well documented, so it’s best not to assign it a founder or a starting year. The observance highlights domestic rats and mice and the people who care for them. It also gives pet owners a reason to share responsible-care information and challenge the idea that these small animals are pests by nature.

Rats and mice have a long history alongside people, but the animals kept as pets are domesticated. Fancy rats are domesticated brown rats, while fancy mice are domesticated house mice. Selective breeding has produced animals with different coat colors, patterns and hair types. Individual pets still have their own temperaments, so appearance alone doesn’t tell you what an animal will be like.

Getting to know fancy rats and mice

Both species are curious and benefit from an environment that gives them room to move, explore and rest. Their needs aren’t identical, though. Rats are social animals and are generally kept with other compatible rats; mice also need thoughtful social arrangements, with compatibility depending on factors such as sex and individual behavior. Anyone considering a pet should get species-specific advice from a veterinarian familiar with small animals or a reputable rescue.

A suitable home should be secure, well ventilated and easy to clean, with bedding that’s safe for the species. Hides and enrichment give small pets places to retreat and opportunities to investigate their surroundings. A balanced diet and fresh water matter, too. Before bringing any animal home, check current care guidance and make sure a suitable veterinarian is accessible. These pets may be small, but their care is a real commitment.

Rats and mice can learn to recognize familiar people and may become comfortable with gentle handling. They’re also vulnerable to stress and injury, so handling should be calm and careful, with the animal supported rather than squeezed or grabbed by the tail. Children should interact with them under close adult supervision.

Ways to observe the day

• If you already have rats or mice, check their enclosure for anything that needs attention: clean water, suitable bedding, secure doors and places to hide. Follow a regular cleaning routine rather than making sudden changes that could unsettle them.
• Offer safe enrichment suited to the animal, such as a cardboard hide or a clean, untreated item to investigate. Remove anything chewed or damaged, and avoid materials that could be unsafe if swallowed.
• Spend quiet time observing your pets. Notice how they explore, rest and respond to familiar sounds, and let them choose whether to approach you.
• Share reliable care information with someone who’s curious about pet rats or mice. Point them toward a small-animal veterinarian, an established rescue or a trusted animal-care guide.
• If you’re thinking about adopting, contact a rescue and ask about the animals’ needs, social compatibility and medical history. Prepare the enclosure before adoption, and make sure everyone in the household understands the care involved.

Last updated November 5, 2026.

Related holidays

Nov 1Polar Bear WeekNov 1National Animal Shelter and Rescue Appreciation WeekNov 7World Numbat DayNov 7National Bison Day

🎂 Find out what's celebrated on your birthday →