Cranberries are great for both cats and dogs. Not only are they full of vitamins A, B1, B2 and C, but they’re well-known for helping maintain healthy urinary tracts. Cats are especially prone to urinary-tract infections and can benefit from eating cranberries (or taking cranberry supplements). On Thanksgiving, if you’re making cranberry sauce from scratch with fresh fruit, feel free to share. Canned cranberry sauce and jellied cranberry sauce, on the other hand, are full of sugar and should not be given to pets.