I don't think MAXIMUS is jealous. He just wants to be part of the fun. Or greeting Kevin at the door after work. He wants to be first, or just makes sure he's not forgotten. He dosen't want to be left out. As far as other dogs, he simply won't share. We have to be sneaky. If we've touched another dog while we were out, he knows. You get the nose poke. He pokes you with his nose, rather hard, while giving these exaggerated sniffs. "Where you been?" "What's that smell?" "Puppies?"