Not trying to be rude, but it is very unnatural for the horse not to grow a coat. It weakens their ability to fight infections and things like that because of the unnatural blanketing when they are supposed to be growing a coat. I know a lot of people do it for show, but it really isnt all that great for the horse. I have never blanketed my horses and they lose their hair once they are ready to. When a horse is blanketed when it is warm out, it wears them out quicker because their body temperature is higher than it should be, taking more energy from the horse just to try to be more comfy. I know that sounds a bit overboard, but if you do the research, you will find it to be true.