Do pigs eat other animals

Yes, pigs are scavengers and have been known to eat small animal carcasses that they find - although they won't tend to actually hunt an animal down.

In the book and film "Hannibal" Mason Verger keeps pigs which he alternately starves and then feeds with human flesh. Thus the pigs become used to the taste of human meat and will devour his victims that he ties up in their sty. This is technically possible although I wouldn't recommend it as a hobby.