Being a good cat owner means getting to know them well enough to pick up on signs that something might be wrong. When in doubt, always pay a visit to the vet, but here are some particular indicators that your cat may need special medical attention:
1. Sudden, unexplained weight loss
Unlike humans, dieting isn't really a thing for cats. If you've noticed your feline friend has shed weight rapidly over a short period of time, take them to the vet as soon as possible: it could be a sign of cancer, liver or kidney issues, diabetes, heart disease or a number of other things.
2. Seizures
It's not just neurological issues that can cause seizures in cats - in many cases, it's can be a sign of poisoning too. In any case, seizures are serious business and should never be ignored.
3. Coughing
While for humans a cough here or there is usually harmless, in cats it can usually indicate something more serious, like asthma, lung disease, pneumonia or other more grave illnesses.
If your cat is coughing, take them straight to the vet.