Here are some training tips if your dog is showing signs of leash aggression. Leash aggression is when your dog acts aggressive during walks, usually much more aggressive than normal. The best training tip is to carry small treats and give one to your dog whenever you see something that normally makes your dog aggressive. For example if you see a dog barking in a window and that usually makes the hair on your dogs back stand up try to give them a treat before they see the other dog. Eventually your dog will see a dog in the window and look at you for a treat, ignoring the dog in the window.