I didn't mean to fire up an argument, but there is so much misinformation out there. A prong collar keeps a dog from chocking himself on a flat collar or a choke collar when he pulls on the leash. The prongs should be rounded and do not hurt the dog. The pressure is similar to a mother dog nipping the puppy's neck skin. Surely you would prefer a small amount of brief pressure instead a collapsed trachea. Who cares if the dog doesn't like it for a few moments. Children don't like medicine but it saves lives. Just like medicine, you don't give medicine when your child is well, and you don't use the prong collar after the dog stops pulling the leash.