Preface: Saturday, I gave my horse a bath & washed his tail well (no new shampoo or conditioner) and brushed/picked it out Sunday, so I KNOW this wasn’t there then.
Last night, I was checking his tail and found this. No roughed up or missing hair. Sorry pics aren’t great, but it is very hard to take pics of things under hair. It looks like the raw/oozy/crustiness of a tick bite, but it is an area way bigger than I’ve ever seen for that. Probably 3x4 inches or so. Barn (& trainer) consensus is a bug bite he rubbed, but just curious if anyone here has any other ideas on what it is or how to treat?
He has been dewormed & his sheath done within the last few weeks as well. Thank you!