Hi Macs' mom... hope you see this. What a cutie, he is a beautiful pup. Just wanted to explain the issues of Gentle Leaders on toy breeds and a few others, (Boxers, Pugs, Bostons, ect.) You'll find the closer the nose band is to the eye and tear duct, the more the dog fusses to relieve the pressure. Ideally the pressure is on the bridge of the nose, when the dog pulls. (As is the case with a Halti) With a GL you have to get the nose band all the way up to the "stop", in order to clip securely. (The portion of nose that graduates from forehead down.) For some dogs this is a gradual slope. Goldens, labs, GSDs'. For others it is a very short or abrupt drop, leaving the nose band sitting just below the tear duct in order to stay on without allowing the dog to paw it off. Toys and shorter muzzled dogs are very sensitive to this pressure. There's just not that much muzzle/nose for that band to sit on. Reccommend using a wider martingale style collar ( or wide buckle collar as dr2 stated) if you think your dog might slip his collar. Your pup's lucky to go to work with you daily! Can't wait to see more pictures.