Normally when it comes to the horse world if ignorance was energy, it would be a nuclear powerhouse but, I am so blown away by the great advice you guys gave! I would suggest when you clean the hooves pay attention to any signs of laminitis. Normal for most horseman. Anytime you get a rapid gain it can be tempting other issues. These gains are not unreasonable in my opinion but, better safe than sorry. While you have a low starch approach, this will help keep the lactic acid down but I would still be using a probiotic with HUGE amounts of CFU's. I like the new Equiotic. It is equine sourced so, unlike others it doesn't all die off.