He won't put his belly on the floor. When I get the treat to the floor, his butt goes up.
you putting him in sit first ? try scooting the treat along the floor for a foot or so . he will have to stay down and reach or gently press on his butt to put it back down. Does he know the sit stay ?
He can sit and stay. He'll follow it with his nose halfway, then stand right up. My arms aren't long enough to keep his butt on the floor and the treat in front of his nose.