So my dog already knows down, but he always puts his butt down first, then crawls forward into the down (2 step). I am trying to teach him to drop straight down (single step). I am starting by trying to get him used to the biomechanics by luring him with a treat straight down. He does very well when a treat is involved. I mark it with a yes and follow with a treat. I eventually paired it with the word down and he still gets it with the treat. The moment I take the treat away he defaults to butt down first then crawls forward into the down. I may have to back track and work on the biomechanics some more before pairing the word. Any suggestions?