Wait, Wha?

So the dog who was not getting rewarded stopped trying to get rewarded? No kidding.

This is thought to be because the dog feels its unfair?

Maybe if the dog who WAS getting rewarded stopped playing. Feeling guilty that the other dog was not being treated fairly.

I think the dog is conditioned to know or think that no reward is coming, so why play. It has nothing to do with the other dog being rewarded.

I will go read the article now to see if this experiment is completely off base.