Today I came across that my horse has Mud Fever. Which can be a disease. It's from being out in the mud. Which she isn't outside all night. Anyways, I would all like to share a site with you on Mud Fever just in case your horse may end up with this problem. You can prevent this problem by purchasing an item that shows you on that website. And you can also purchase leg wraps to put on your horses legs for when it's put outside. Like I said, I thought I would share this information with you if you ever come across this problem.