My parents had two dogs that got along quite well. There was a clearly established alpha dog, Sophie. Sophie had been sick for awhile and near the end her appetite was increased. She seemed ravenous. Cooper, who never had issues emptying his bowl before, was now leaving half, if not more, food uneaten. I thought it was because my dogs (boxers) and I were visiting and he was stressed. But since Sophie passed, he has been eating everything without a problem. Was cooper leaving his food for Sophie? I should also mention that my dad would not give Sophie Cooper's leftovers. He would sometimes give her more food, but never Cooper's.