another one, maybe not so much of a myth, as a mistake made during teaching dogs tricks, is the use of the word "no". No one has to say "no" when dog does wrong move. Just ignore wrong moves, and reward correct moves. or reward attempts in right direction. Occasionally, on some cues, i will interrupt/distract a wrong move, but, typically, i just ignore wrong moves. If Buddy is getting frustrated with trick, i intersperse tricks he DOES know well, in between his efforts on the new trick. Or, a tip i learned from Jean, is move from room to room, or train tricks outdoors, this can help a dog find it more interesting, to stay at tricks they find harder. As well as swapping out what type of reward i am using, also helps Buddy stay at a trick. but, most of us here, just never ever use the word "no" during trick training.