Boxer Training Confusion

Moose, the lovable boxer/English bulldog mix that was found at a kill shelter a couple of years ago, is always eager to please. Here he exuberantly tries to learn a new command, ‘crawl’. But he ends up confusing the command he learned earlier in the week, rollover. The only thing we need to entice and get his full attention is bits of his dog food kibble. He is so lovable and just wants to please. We scratch are head and cannot figure out to this day why his original owners dropped him off after they had had him for 2 years at that kill shelter. We are thankful to Mostly Mutts for finding him, saving him and allowing us to adopt him.