i tried the gentle leader on sumya and i found to be more hindering than helping. all she did was scream and cry and trash around when it put it on her. it can also be very hard to properly position because of their squarish ( not even sure that is a real word :lol: ) muzzles, some say it i can impair the ability to properly breathe. but that was solely my experience with it. i suggest if you want to try it, buy it from a store that has a satisfaction guarantee on their products.petsmart does, that is where i got mine from.