My horses skin has been peeling and flaking really badly for at least the last month now. Mainly just their necks, shoulders, and between their legs. I have rinsed them with cool water and am constantly trying to brush it out but it won't heal. I thought it was just bugs, mosquitoes and such, but then I read that some fly sprays can cause peeling skin. Is this true. I use Pyranha fly spray.
Any advise on what could be causing it and what can heal it would be much appreciated.