Cats
When to Worry: Warning Signs in the First Weeks With a New Pet
New animals hide illness. Cats do it because they always have; dogs do it because they are still working out whether it is safe to show it; birds do it because in the wild it is the difference between a perch and a predator. Here is how to tell the difference between an animal that is settling in and one that needs a vet — and what "worth a call" looks like for each species.
