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How long do pet rats live?
The RSPCA, PDSA, Wood Green and Burgess all give 2 to 3 years for a pet rat. PetMD, written by a vet, widens it to 2 to 4 years. The two do not really disagree: most rats live into their third year, and a lucky few see their fourth birthday. The record, according to Guinness World Records and quoted by Burgess, is Rodney from Oklahoma, USA, who lived to 7 years and 4 months.
That is short next to a dog or cat, and it is the hardest part of keeping rats. It also means every month counts. Rats pack a lot of living into their time: they bond with their people, can be trained, and soon learn to come to the cage door when you appear.
How long do wild rats live?
Much less. PetMD says wild rats usually live less than a year, because of predators, disease, cold, hunger and no vet care. Pet rats are the same species as wild brown rats, so the gap is down to safety, food and care, not genes. If you are reading this because of a wild rat at home, it is not a pet: do not try to catch or handle it.
Rat life stages and rat years
Once grown, each rat month is roughly 2.5 human years, according to Burgess and PetMD. That makes a one-year-old rat about 30 in human terms and a three-year-old about 90. The stages below use dates from the RSPCA, AFRMA, Wood Green and the Rat and Mouse Club of America (RMCA). The exact boundaries between stages are our rough guide, not fixed lines.
| Stage | Age | About this in human years | What is happening |
|---|---|---|---|
| Newborn kitten | Birth to 3 weeks | Baby | Born after a 21 to 23 day pregnancy, in litters of 6 to 11, weaned at about 3 weeks |
| Young kitten | 3 to 6 weeks | Child | Eating solid food, playing hard, learning from the group |
| Teenager | 6 weeks to about 6 months | Teenager to young adult | Puberty from about 5 to 11 weeks. Ready for a new home at 6 to 9 weeks. Lots of energy |
| Adult | 6 months to about 18 months | 15 to 45 | Full size. Settled, confident, at their most active and playful |
| Older adult | About 12 to 24 months | 30 to 60 | Lumps can start from about a year, especially in females. Weigh weekly |
| Senior | About 18 months to 2 years and over | 45 to 60 and over | Slower, sleepier, may lose weight or strength in the back legs |
Do male or female rats live longer?
Females, by a little. The RSPCA says females usually live longer and mature earlier than males. Wood Green finds bucks generally more cuddly and does more active, which tends to hold through their lives. The bigger risk for females is mammary lumps, which Wood Green says can appear from about one year old. PetMD notes some vets recommend spaying before 5 to 7 months to reduce that risk. Talk it through with a vet who sees rats. Our guide to male or female rats compares them in full.
What do pet rats usually die of?
The main causes of illness in pet rats, from the PDSA and PetMD, are breathing infections, lumps and tumours, and problems linked to old age. PetMD adds that most life-threatening conditions in pet rats follow from poor care, so the basics matter.
| Problem | Signs | What helps |
|---|---|---|
| Breathing infections | Sneezing, clicking, rattling, wheezing, red-brown crust round eyes or nose | Clean cage, dust-free bedding, good airflow, vet as soon as possible |
| Mammary and other lumps | A swelling, often on the belly, sides or armpits | Weekly checks, early vet visit, spaying discussed with a vet |
| Ear-area tumour (Zymbal's gland) | Swelling near the base of the ear | Vet visit, as it can be painful |
| Back leg weakness | Slipping feet, falling off shelves, less climbing | Lower shelves, ramps, vet check for treatable causes |
| Pituitary tumour | Front paws weak, trouble holding food, head tilt, loss of balance | Vet visit early, when treatment helps most |
| Teeth problems | Drooling, dropping food, weight loss | Safe chews, vet to trim or check teeth |
Rats hide illness well, and the PDSA warns breathing infections can get worse very quickly. Laboured breathing, a rat that stops eating or one sitting hunched and puffed up needs a vet the same day.
How to help your rats live longer
None of this guarantees an extra year, but each step removes a common cause of early illness.
- Start with a healthy line. Ask a breeder how old their oldest rats are and what they died of, or ask a rescue about any rat's history. Our guide to where to get pet rats covers what to ask.
- Never keep a rat alone. Keep a same-sex pair at least, three if you can. Rats rely on each other for comfort, warmth and play.
- Feed rat nuggets, not muesli. PetMD advises rat pellets over seed mixes. Wood Green gives about 15 g (½ oz) per rat a day, plus small amounts of vegetables, and fruit and treats in small amounts.
- Keep the air clean. Spot clean wee corners every day and use paper bedding. Ammonia from dirty bedding is a big trigger for chest infections.
- Keep the room right. The RSPCA gives 19 to 23°C (66 to 73°F), out of draughts and direct sun. Our rat temperature guide covers hot and cold weather.
- Get them moving. Give at least an hour out of the cage each day and lots of climbing in it.
- Weigh every week. PetMD says weight loss is the most common first sign of illness in pet rats. A kitchen scale and a notebook catch it early.
- See a vet before there is a problem. PetMD recommends check-ups every 6 to 12 months. Find a vet who sees rats while your rats are young and well.
Caring for an older rat
From around 18 months to 2 years, many rats slow down. The RMCA describes the early signs well: a rat that loses its grip on the cage, falls off a ladder or a box, or climbs less than it used to. Back feet may slip as if walking on ice. A rat that seems older does not always mean nothing can be done. Some causes of weakness respond to vet treatment if caught early.
- Lower the shelves and hammocks, and add ramps instead of ladders
- Put food and water on the ground floor, with a low bowl as well as a bottle
- Cover slippery floors and shelves with fleece or a soft mat
- Add extra absorbent bedding if they wee more
- Offer soft foods if eating gets harder, and keep weighing weekly
- Give a cosy hide on the ground floor so they can rest near their friends
- Check for sore spots if they are grooming less, and gently clean them
- Book vet checks at the 6-month end of PetMD's 6 to 12 month range
When a rat's life is coming to an end
When a rat stops eating, cannot move comfortably, or struggles to breathe and treatment is no longer helping, your vet can talk you through gentle options. It is one of the kindest things an owner can do. Afterwards, the rats left behind need care too. Our guide for when a rat loses its cage mate explains what to do next. For everything else, see the pet rat care hub.
Rat lifespan questions
How long do wild rats live in your house or garden?
Wild brown rats usually live less than a year, according to PetMD, because of predators, disease, cold and hunger. Pet rats live two to three times longer, thanks to steady food, warmth, safety and vet care. A wild rat is not a pet and should not be handled.
How long do grey rats live?
Colour makes no difference to lifespan. A grey pet rat, whether agouti, blue or another grey shade, lives the usual 2 to 3 years. The greyish-brown wild rat seen outdoors is the brown rat, which usually lives under a year in the wild. Only hairless rats and some other varieties have been linked to shorter lives.
Is it easy to take care of a rat?
Rats are easier than many small pets in some ways: they are clean, clever and love people. But they are not low effort. They need at least one rat friend, a big cage, a daily spot clean, an hour or more out each day and a vet who knows rats. Their short lives also mean regular goodbyes.
Is it safe to sleep with pet rats in my room?
It is safe, but you may not sleep well. Rats are awake at night, so expect chewing, rustling, wheel noise and water bottle clinks. The RSPCA says rats have sensitive hearing and dislike loud noise, so a quiet bedroom suits them in the day. Keep the cage clean so ammonia does not build up.
How do I clean rat poop and pee?
Scoop wet bedding and droppings from the corners every day, and empty any litter tray every other day. Do a full clean weekly to fortnightly, washing trays and shelves with hot water and a pet-safe cleaner. Wash hammocks at 60°C with non-bio detergent. Wash your hands after cleaning and after handling.
Do female rats live longer than males?
Usually a little, yes. The RSPCA says females typically live longer and mature earlier than males. The gap is small, and family line matters more. Unspayed females are prone to mammary lumps as they age, which spaying can reduce, so speak to a vet who sees rats about whether it is right for yours.
What is the best breed of pet rat for a long life?
No variety reliably lives longer. Dumbos are often said to, but the AFRMA says that has never been proven. The best bet for a long life is a healthy family line from a careful breeder or a healthy rescue rat, with good food, a clean cage and early vet care.
