I bought a 3 month old Appaloosa filly about a month ago, and yesterday I noticed some weird bald spots that almost looked like big scabs on her body. When I came to feed her oats I noticed the first one on her left side by her shoulder and thought maybe she got into something and got cut or just rubbed off some hair. Then as I checked her out some more to see if I could find more, I found 3 more! One was on her left side on her rump, the next was right next to her tail, and the other one was on her right side of her rump. This was the biggest of them all. Well I had to go to work so I came home and would continue my investigation today. Well I went there after work today, and examined her some more, and found two more weird scab things! Only this time I was rubbing her back and petting her and my hand went over some bumps. I started to part the hair to see if I could see what it was, well when I parted the hair, it all came off! In a huge scab!! What it left behind was a moist gray patch. I found two of these today.
I'm not sure what they are, so I called my vet ASAP! When the nurse answered I told her about it, and she said the DR would need to see her ASAP and I totally agree. Well he won't come out for just one horse, so I had to try a different vet. So I called the next closest vet, and he said he thought it might be lice so I should bath her, and if that didn't help, he would come see her.
I took some pictures and would like to hear your thoughts on what it is. I'm not sure if it's rain rot, because I've never had to deal with this type of thing before, but I doubt its rain rot because they have access to the barn 24/7.
She is also losing hair on her face, on top of her head, and on one of her ears. This hair loss isn't accompanied by scabs though, it just looks as if she has been rubbing it off. I didn't get pictures of that, but I will tomorrow and post them on here.
Could it be any type of allergic reaction? She has been wormed with safeguard and that was about two weeks ago. If you need to know anything else, feel free to ask.
Here are some pictures. I only took pictures of the first four spots I found. The ones I found today are larger than the ones I found yesterday.