This is my dog, Monster. He doesn't like green peppers. But if a pig is going to eat it, he considers it his job to make sure that he makes a valiant effort to eat it himself. When we get these massive shipments of fruits and vegetables, he's in a quandry. While he's saving this green pepper for himself, thousands of other vegetables are being consumed.
Being the dedicated dog, he takes a good bite of it, and then decides he doesn't like it.
But when pigs show an interest in this green pepper he carries it off. Dogs are clearly zero-sum thinkers. If a pig eats it I have lost it, so I must save it, even if I really don't like it.