Although there are hedgehog foods available in stores, dry cat and kitten formulas are equally good choices. Whatever commercial food you choose should be supplemented by a variety of other foods such as vegetables, mealworms and crickets, cooked meats, fruit and vegetables. However none of these should be fed as anything more than a treat 3 or 4 times a week. The dry food should be the staple. While the dry food can be fed free choice to all but the more obese hedgehogs, the supplements should be offered for no more than 15 minutes and then removed.
Water can be left in the cage 24 hours a day. Most owners choose to offer water through a sipper bottle hung in the cage. Check it whenever you change the water (at least daily) to make sure the sipper tube has not become clogged with food.