Andy sometimes pops up before I can clean up the fragments of treats that he won’t or can’t eat, leaving just the ones he can or will eat.

It confuses him!

He stares at the mess, waiting for me to clean it up.

On the other hand, if he wants his Greenies bad enough, he’ll give in and tackle the problem on his own. (He wastes a lot of treats, expecting new ones to be put out even when there are some leftovers from earlier.)