Not to discourage Krystal or anything.... but I got a 10 year old bully that still bucks his leash. He is so funny, I take the harness out of the basket and he goes crazy excited (sometimes super excited that he would squirt pee droplets hah hah), then I put the harness and leash and he starts bucking like a bronco... I just let him be until he calms down then we go walking and he's like he's on a dog show stuck to my leg looking up at me like the model citizen that he is... he does this EVERY TIME. And he's 10 years old now.