It’s as easy as fitting his regular collar. They use a standard steel buckle and pin fitting for greater security and a simple, single line to control your dog’s head. There are no complicated instructions, just fit it and go! The Canny Collar can train your dog to walk on a simple collar and lead with no pulling. By moving the slip line on and off your dog’s nose as required, you can gradually teach him not to pull at all, even when he feels nothing on his nose.No need to take the Canny Collar off when letting your dog run free – simply use the carabiner clips to fasten the slip line underneath your dog’s chin (snout) and away he goes. The Canny Collar is simply a standard collar, generously padded for comfort, with a single line of material (the slip line) going over your dog’s nose. This means he is free to breathe freely, open his mouth and enjoy his walk as much as you want him to. There is less material to restrict his mouth which also allows him to get used to the Canny Collar very quickly.