The barn I am at is shutting down because the owners are to old to take care of the horses. There is a stallion I have been working with for awhile that we fear won't be able to be sold because he is A) still a stallion and B) he's underweight because the stable hand doesn't like to take him out (there's three stallions total in the barn very close to each other). They originally had plans on breeding him (he has great bloodlines) but never got around to breeding or really training him. So I'm looking into getting him gelded and start hardcore working with him in hopes he will be able to gain weight and be sold as a good riding horse. He will be 15 this year, what would be the issues/complications on gelding him? Or is there any better way to accomplish this task of getting him into shape and sold?