Guinea pigs require a cage, bedding, food and water for basic care. The animals should also have plenty of exercise and regular health care checkups from a veterinarian.
Guinea pigs require about 8 square feet of space and should have a cage that features a solid floor, rather than a wire mesh floor. Place a small cardboard box in the cage to allow the pet to hide when it is frightened. Place 3 inches of bedding on the floor of the cage, and replace the bedding twice weekly to maintain the cleanliness of the cage. Remove the bedding and wash the cage with warm, soapy water weekly.
Guinea pigs eat a diet of fresh fruits and vegetables combined with commercial food and should be fed small portions twice daily. Cut fresh fruits and vegetables into small pieces before offering them to the guinea pig, and remove any uneaten food promptly to prevent spoilage. Guinea pigs should be provided foods rich in vitamin C, such as oranges, and fresh water on a daily basis.
Provide the guinea pig with untreated wood blocks to chew, and allow the animal to leave its cage daily for exercise. Always supervise the guinea pig when it is out of the cage to prevent the pet from becoming lost. Trim the guinea pig's nails twice monthly, and take the pet to the veterinarian annually at a minimum.