Got a super-puller on your hands? Proper equipment can make a big difference. Try using a front clip harness or head halter (Freedom Harness or Halti Harness for example). Avoid choke or prong collars as these can cause not only physical damage, such a trachea collapse and breathing problems, but can also lead to more severe behavioral problems. For example, when a dog is wearing a collar that causes choking or pain they can start associating the things they see with that pain. So if they pull on the leash every time they see another dog and they are choked, then they can start associating other dogs with pain and start acting aggressively.