Cat

Cats are small predatory animals that can be found at least on two different planets: Earth (the third world of the Sol System, in the Milky Way Galaxy) and Melmac (assumed to be located in the Andromeda Galaxy).

Cats are agile and clever hunters and their menu consists of all sorts of small creatures, including pests like Rats, which is why they are widely kept as pets by Humans. On Melmac, on the other hand, Cats are considered a delicacy and they are a favorite dish of many Melmacians.

It is unknown if the Earth Cats and the Melmac Cats belong to the same species.

Sapience
Sometimes Cats are depicted as sapient beings, e.g. Dilbert Universe, Garfield Universe, etc...