So my gelding has rainrot and I want to keep him stalled. I've heard it can spread to other horses but my main problem is the mud in the pasture. Theres a small creek in back and is always getting the horses muddyn the manager doesnt want him in so she doesnt have to feed him extra and stuff. Wont it spread if the mud stays or gets on him? I want him in so he can get better faster. We are treating it but we don't know if we should put him jn the arena or outside?