Both my mice and my rats receive an assortment of goodies. Their staple consists of Forti-Diet, mixed with a general "rodent" blend of loops, seeds and dried fruit. On top of this I give them all fresh pieces of fruits and vegetables (just be careful not to give Legume heavy items or things that could cause gas troubles). I find that bananas, peaches and apples are great fruit sources. Carrots, cabbage, lettuce...even cucumbers are great vegetable sources. I also feed them a decent amount of protein, such as peanut butter, pieces of cooked chicken or pork chops. As stated earlier, mice and rats are omnivorous, so a good balanced selection of foods really makes for healthier happier rodents.