My 6month old Brittany puppy pulls on the leash like he weighs 200lbs. I have been recommended the easy walk harness and I wanted to know if anyone has used it before? I've watched a bunch of youtube videos on how to fit it properly and use it properly so I'm fairly confident there, but does it really work? I'm not expecting a miracle, I just want something to cool his jets so I can do more "heel" and leash training. Also, can I leave it on him when he goes in the kennel? Usually he has to go out to pee immediately when he gets out of the kennel and I don't know if it's too fussy to put on in a hurry.