A weekly check works because rats change slowly and hide illness well: no single look tells you much, but a change from last week tells you a great deal. Pick a calm moment when your rat is awake and relaxed, keep the routine in the same order every time, and handle gently — the aim is a rat who treats the check as ordinary fuss, not a wrestling match. Five unhurried minutes, once a week, covers everything below.
Teeth First: Short, Even and Aligned
Lift the lips gently and look at the front teeth. Healthy rat incisors are orange-toned, sharp, and meet evenly; the lower pair is longer than the upper and moves slightly, which is normal. What you are watching for is uneven wear, one tooth grown long because its partner is broken or misaligned, a tooth snapped short, or your rat drooling or dropping food it normally manages. Rats' teeth grow throughout life and normally grind themselves to length, so a change in that neat alignment is worth a vet conversation even if your rat is still eating happily — dental trouble tends to announce itself at the food bowl next.
Chest Sounds: The Ear Test
Rats are prone to respiratory trouble, and your ear is a genuinely useful instrument. Hold your rat calmly with its chest against your ear — keepers call this rat phoning — and listen for a minute. A healthy chest is quiet or softly whooshy. Clicking, rattling, wheezing or a crackly sound, especially if it is there every time you listen and not just for a few seconds after a sneeze, is worth noting and reporting. Pair the sound check with a look: breathing that labours, flanks heaving, or a rat who sits hunched and fluffed up between sleeps is a different picture from a bright rat who rattled once after burrowing in dusty bedding.
Hands Over the Whole Body: Lumps and Skin
Run your fingers slowly over your rat's body with light pressure — down the back, along both sides, under the chin and armpits, and along the belly. You are feeling for anything that was not there last week: lumps under the skin are common in rats, particularly as they age, and the useful facts to note are where a lump is, roughly how big it feels compared with last week, and whether it moves with the skin or feels fixed. Check the skin as you go for scabs, bald patches, excessive scratching damage or flaky areas, look at the eyes for discharge or red staining around them, and glance at feet for sores, especially in rats who live on solid floors and heavier older animals.
Finish With Weight and Behaviour
Weigh your rat the same way each week — on a small kitchen scale, in a bowl or box it trusts — and write the number down rather than trusting memory. A steady weight in an adult is reassuring; a slow drift down, or a young rat who stops gaining, is early information. Finish by asking yourself the behaviour question: is this rat greeting you, exploring and eating as it did last week? Taken together — teeth, chest, hands, weight, behaviour — your weekly notes turn into a short health history. KinsLe's Pet Passport holds those weekly entries alongside vet visit records in one packet, so when you do phone the practice you can describe exactly what changed and when, instead of saying your rat just seems off.