You can look up the harmful foods here, or on your own. But as far as fruit is concerned, Graysee loves watermelon, honeydew, oranges, apples, blueberries, raspberries, and sometimes, strawberries. I've read where cherries are not good for them, and raisins and grapes are out, too. As are avocados, onions, garlic and tomatoes. And be sure to avoid ANY fruit pits, such as from apricots, cherries, peaches, plums, etc.