Ive tried everything with Kodie for him to stop pulling.He's too stubborn His obediance Trainer told us to get him him,because she knew that he likes to pull.This thing works very well on him,he responds good to it.If he didnt have it on,i'd be getting dragged around in the dirt,literally.I dont plan on using it on Lucy though,she walks nicely already and dont have any problems with her I dont have a problem with it if its used properly.I see mostly the Larger breeds walked with a Prong collar.ive never seen a small dog with one.