Cats are experts at hiding when something's wrong — it's an instinct left over from the wild, where looking vulnerable made them a target. That means by the time a cat is obviously unwell, the issue may have been building for a while. Knowing the subtle signs can help you catch problems early.
A sudden change in appetite
Cats are creatures of habit, so if your usually food-motivated cat starts skipping meals — or suddenly can't get enough — it's worth paying attention. Both directions can signal anything from dental pain to more serious underlying issues.
Litter box changes
Straining to urinate, going more or less frequently, or accidents outside the box are all worth noting. In male cats especially, difficulty urinating can be a genuine emergency, not just a behavioral quirk.
Hiding more than usual
An occasional nap in a new spot is normal. But a cat that suddenly withdraws, avoids interaction, or hides for extended periods is often telling you they don't feel well — cats hide discomfort by isolating themselves.
Changes in grooming habits
A healthy cat grooms regularly and keeps a fairly neat coat. A greasy, matted, or unkempt coat can be a sign your cat feels too unwell to keep up with their normal routine — grooming is often one of the first things to slip when a cat isn't feeling their best.
Noticeable weight loss or gain
Because cats are small, weight changes can happen gradually and go unnoticed until they're significant. A quick monthly check — even just picking them up and noting how they feel — can help you catch this early, especially in cats over 7 years old.
When to actually call the vet
Any single sign on its own might be nothing. But if you're noticing two or more together, or any sign persists for more than a day or two, it's worth a call to your vet. Trust your instincts here — you know your cat's normal better than anyone.
