Pigs mainly drink water when they're older. But, when they're piglets they drink milk. They eat a wide variety of foods such as apples, carrots, eggs, peppers (non spicy), cabbage, basil, tomatoes, potatoes, bananas, mushrooms, beans and wheat (etc.) Not all of these foods may be good for your pig(s) so try feeding some of the different foods than, choose the ones the pig likes most. If you feel your pigs need a treat try something healthy unless, you want to give them something unhealthy, then go for it!