To me, the only factor that really matters whether I'd like my dog to shake or not is the "spot" where he/she has it. On the head I prefer just taking control; on the throat and gut just dig in; chest, legs, stifle, shoulders & armpits shake the heck out of it! The dog's mouth power doesn't really matter. More mouth will just be a bonus. I won't be worrying about my bulldog losing a tooth during a hunt...just need to come out victorious on that hunt.