The best dog collars for this purpose are safe ... with corresponding thicknesses of 3/8 up to 1 inch — and offers a 6-inch range of adjustability in each size. Five collar colors are available ...

The good news is many, if not most, pups will change their behavior with consistent obedience training and a good dog training collar. I’d bet a truckload of Milkbones that not a single dog ever ...