1. Your Cat Is Urinating Outside Their Litter Box
As annoying it might be when you've got to clean it up, don't let this distract you. Typically, when a cat urinates outside their litter box, they are trying to tell us something. If you're not sure what exactly that is, you should consult your vet or a cat behaviorist.
2. Your Cat Is Grooming Itself Excessively
While cats are known for their meticulous grooming, if your cat is licking itself bald or raw, this is a sure-fire sign of distress. Rather than consulting a groomer, you should head straight for the local vets
3. Your Cat Is Constantly Scratching
Just like compulsive grooming, constant scratching can also indicate a number of health or behavioral issues. If you've noticed your cat is scratching excessively for some time, you should make a trip to the vets.
4. Your Cat Is Isolating Themselves More Than Normal
Of course, aloofness is second nature to cats, although they can be relatively social when they're in the mood, they also need space. With that said, if your cat is actively avoiding you or hiding from you and everyone else in your household, there's likely more to it. While you shouldn't stress your cat out anymore, you need to try to get hold of them and head to the vet.
5. Your Cat Is Vocalizing More Than Normal
Although many find a cat "talking" away quite soothing thanks to the sweet tone, you should be aware of any usually long or reoccurring meows, particularly if they sound panicked. Rather than attempting to crack the kitty cat code yourself, you should head to the vets as this can be a sign of many different things.
6. Your Cat's Appetite Has Decreased
Unlike the humankind, cats don't diet or go on fasts. If you've noticed that your feline is eating less or they stop eating altogether, a trip to the vets is due.
Other signs of stress include increased aggression to both animals and people and unusually long sleeping patterns. Of course, every cat is different. So generally, any out of character behavior that goes on for more than a day or two is cause for concern, you're best off visiting the vets for peace of mind.