I'm not sure where to put this so feel free to move it if its in the wrong place. My roommate has a Parson Russell Terrier, Chance. I decided to try training him, since she doesn't care for it. He is really smart and knows sit, down, stay, wait, shake, spin, around, play dead. But lately he gets so fixated in the treats that he can't sit still and will every trick he knows, and eventually will just play dead and lay there until I give him a treat. Or He won't listen to me at all, and just stares at the food. I'm not sure what to do because he isn't toy motivated either. He likes to play with the tennis ball but again he gets to fixated on it that he can't focus and will just bark at me to throw the ball. Is there something I can do to teach him to stay calm and focused on me so I can teach me new tricks? My roommate thinks he is a lost cause but I don't think so.