I bought a mini horse last year..he is broke to a cart but hasn’t been drove in a year. I bought a cart and harness this weekend. I had been driving him off and on. I hooked up the harness and drove him for a while, then I hooked up the cart and walked beside it for a bit. I got on and he was fine for a while. It was like the cart would bump him when we started and stopped and also when we went up the ditch(it wasn’t deep) well the cart spooked him and he took off. I was wondering what would help the cart stay steady. I think I. Had the traces tight enough. He doesn’t wear breeches..do I need them? This is my first time driving a cart!