I recently adopted a giant angora and am unsure how much to feed him. I make sure he has access to hay at all times and take him outside a few days a week, but with the grain I give him about 1/2 a cup a day and he eats it all immediately and goes nuts when I feed him. where as my other dwarf bunny only eats a little at a time throughout the day, I want to give him more but I'm afraid he'll overeat, he already feels a chubby so I don't think I am underfeeding him.