I know I've already posted about the choke chain and this is a variant of that, but I REALLY want to put up a posting about this. For those of you who are not familiar with it, this picture is a prong collar.
The way it fits is it goes around the dog's neck like a choke chain. The martingale will tighten as the dog pulls and the prongs push on the dogs neck. In theory, it is supposed to teach a dog not to pull.
Now, I need to insert a comment here that if your dog wants to be with you, then he wouldn't be spending all his energy trying to run away from you and pulling on leash, would he?? If your dog is pulling on leash then you have other issues underneath the pulling problem and you should start looking at your relationship with the dog.
Many people feel they need to use prong collars for their dogs to keep them under control (especially large breeds). These collars are often used for dogs that pull on the leash. Used properly, I hear they can be a safe and effective training tool. To use properly, the dog must be able to walk on leash without pulling excessively and without lunging. If they do, you risk damaging your dog. (now, if your dog walks on leash without pulling excessively and lunging then why do you need a prong collar??)
If they are not used properly, this can happen. If the dog lunges or pulls or the owner pulls too hard, the prongs have the ability to enter the animal's neck.
Now, this seems a bit like an oxymoron to me ... if you have a dog that pulls too hard, you may want to get a prong collar, but you can't use the prong if the dog pulls too hard otherwise you may harm your dog ... are you confused yet?
In order to use it safely and effectively, the dog needs to be a NON-puller. So then why would you feel that you need to resort to the prong in the first place??
Obviously, this is a tool I have never used and won't, but I wanted to point it out. I do know owners who swear by it. If you can't figure out how to teach your dog to want to be with you, then why would you think that forcing a dog in this way would make it want to do it any more??