Today I went out to my horse and noticed about a dozen or so bumps on his butt and 2 on his neck. I know it can't be bug bites because he is always covered with either a sheet or fly spray. I don't think it is hives because there's nothing that really changed and if it were hives I would think the majority of them would be on his neck.
Does that sound right? And if it is fungus then what is the best way you have found to treat it? Today I put M-T-G on it because it was all I had but I am going to go to the store tomorrow. Any suggestions?