I ask as was talking to my husband earlier and our barney just eats and eats and eats, he just never stops. If i give it to him he will eat it. I give him his rabbit food but also carrots and apples and any veg i may have in the house, also some salad as well. So that is his diet anyway. But we were watching him earlier, i gave him 2 carrots and then he was eating a whole bowl of rabbit food as well. I know rabbits cannot be sick but can they die of being overfed???