Cats enjoy treats made with fish, chicken, and small amounts of cheese. If you have small pets like rabbits or guinea pigs, treats made from fresh vegetables, hay, and oats are great choices.

EVERETT — For 364 days a year, a guinea pig is just a guinea pig. Now, the cavy can join other house pets and be unicorns and superheroes on Oct. 31. What’s up with that? At PetSmart, the $6. ...