Here is something I tracked down knowing that there is the other side of this product that goes under mentioned and it great to get both sides of it.
Like any tools used there are good and bad points here the bad.
A Not So Gentle Leader
I am not saying use or not use just you need all the info to make and educated choice.
One other thought is it for aggression or just pulling. Ok I know pulling is bad enongh 9 pound former frieght train owner here but we can work pulling without a head halter there are some great things that can be tried.
JL