Cave felem!

Cave canem, which means: beware of the dog, must be one of the best known Latin phrases.  But how do you say: "Beware of the cat"?  Well, beware will be just the same.  Cat is feles, -is (f).  Canem is the accusative singular of canis, -is (m/f) dog.  So I guess beware of the cat must be: "Cave felem!"