I REALLY don't like that sound of that! That sounds like ring worm. It developes do to bacteria. Is the run clean? You should REALLY call the local humane society or something. Every town has some sort of law that states dogs MUST have water,food,shelter,and proper vetrinary care. It sounds to me like they aren't getting ANY of that. You should call the local humane society. They will keep your name and other inforation anounomus if you want. Those dogs can wind up with better homes if you do call.