A few days ago

I awoke to find speckled pup in her crate, blackdog looking chagrined, and several empty food cans chewed up. Getting stuff out of the trash is nothing new for blackdog, it's one of the reasons I try to wash off all food-type stuff I put in there. I can't figure out how he chewed these cans up, extracted any remaining food particles, and DIDN'T cut up his mouth???