I am not a big fan of spurs at all! Although they might be a handy tool if you know how to use them right. I just see so many people wearing them and spuring the horses ALL THE TIME and the horse just gets numb to it. How is he doing on the ground? In the round pen, I have one horse that is more on the slow side but with some ground work he improved a lot under the saddle. I started on the ground, asking for trott, faster trott, canter, faster canter and just get the horse in good shape. It helped me in the saddle because honestly it is no fun to be exhausted from kicking and putting leg pressure on after the ride. It might help, it did for me anyways. So good luck.