My barn has a lot of mud right now, is that harmful for there legs? I read an artical in HI a while back saying that it is good to let the water tank overflow some so that they have to walk in it to get to there water as it is good for there hooves. But how much is too much? Its REALLY muddy and they have a big barn to go in but still. So, is it harmful? theres not really a way to keep them out of it but is there anything I can do?