Free: Contests & Raffles.
Sit down next to him with food bowl and make him wait for you to set it down. Then make him wait till permission granted. Order him stop n take it away. Repeat.
don't get on facebook and look for advice. Those pages are full of the craziest, most unknowledgeable people you'll ever find on the planet and some even breed chessies. put the dog in a crate, alone in a quiet place and let him have dinner without screwing with him every day, every single time. Don't get fixated on playing food games, taking bowls back and forth, touching his nuts, rubbing his weenie or whatever other goofy ideas people say. Not a kennel, a crate. in a room alone. put him in it. feed him and leave him alone for a good solid hour with zero interaction. The issue has a lot to do with stimulus. They need no outside stuff going on around them to relax. Doing all this talking, petting, touching, grabbing and whatever else just makes it worse. Again, single plastic dog crate. Alone in a garage or whatever room is the most noise free, quiet place in the house. Feed him in it, every day until he dies. Nobody gets bit. Dog is happy. Happy, non stressed out chessies make the best family dogs.