TRY TO FEED 3 VEGETABLE SERVINGS PER DAY. BE SURE ONE IS SOME TYPE OF LEAFY GREEN. PLEASE, NO MORE THAN 1 SERVING OF ANY GIVEN VEGETABLE!!
A variety is necessary in order to obtain the necessary nutrients, with one each day that contains Vitamin A. Add one vegetable to the diet at a time. Eliminate if it causes soft stools or diarrhea.
Limit fruits to 1-2 tablespoons per 2 lbs. of body weight (none if dieting) from the list below of high fiber fruits. USE FRUIT ONLY ONCE OR TWICE A WEEK. Sugary fruits such as bananas and grapes should be used only sparingly. Guineas have a sweet tooth and if left to their own devices will devour sugary foods to the exclusion of healthful ones.
This is an excellent site for vitamin content of vegetables: http://www.guineapigcages.com/food/Veggie-and-Fruit-Charts.pdf
Absolutely NO Chocolate (Poisonous!!!), cookies, crackers, breakfast cereals, bread, pasta, yogurt drops or other "human treats." There is research to suggest these items may contribute to fatal cases of enterotoxaemia, a toxic overgrowth of "bad" bacteria in the intestinal tract.
Large, unlimited amounts of fresh hay should be offered daily. Young guineas should be introduced to hay as soon as they can eat on their own. Mixed grass (e.g., orchard grass) or Timothy hay is preferred because it is lower in calories and calcium than alfalfa. It is also higher in fiber.
See more here:
Guinea Pig Care and Diet - Metropolitan Guinea Pig Rescue
