Our 9 month old puppy is 65lbs. We are having a lot of difficulty training him on how to walk on a leash. We wants to chase all the cars that pass us. We just recently started using a harness during long walks. Whenever we walk with our 4 yr old dog and he's wearing the harness he becomes aggressive when cars pass by. So...what do we do about him wanting to chase cars?? And does a harness make certain dogs aggressive??
Re: Walking questions...
A harness makes it easier for a dog to act up on a walk. The harness actually makes it so they can pull harder. Think about dogsledding dogs. They have harnesses on so they can pull the sled. They can pull with their entire body. We have done multiple training classes with our dogs, and every trainer recommends a pinch collar. I would recommend the puppy classes at your local pet store. They go over leash training very well.
I agree with the pp about bring treats along with you, we did this as well when we were first training. I would even have the dog sit while the car is appraoching and reward with a treat if he behaves.