A prong collar is a device that has metal fang-shaped prongs on it that is worn around a dog's neck. When it is pulled tight the prongs create a pinching effect, which causes pain or discomfort for the dog. ... This is when the dog hits the end of the leash causing the prongs to tighten. Dog prong collars are cruel collars which dig into the skin of dogs causing the animals much pain and distress. Innocent dogs live horrible lives due to the pain they are feeling from the collars. As a dog owner I am happy that my dog is safe and does not have to undergo this treatment however many poor dogs do. Please. Help so many dogs in the UK today. Please, sign this petition to stop this cruelty.