It took a very slow examination to find 1/8" diameter flakey, raised scabs, 1/8" high hidden in his winter hair. These were only under the the loose crown of the halter, about 5" behind the poll. There are about five scabs on the non-mane side of his neck. Dark scabs in thick dark hair did not photograph well.
The scabs appear to be painful; Fudge does not want me to touch them. He only wears a halter when tacking up and during baths. He had a halter on for about 4 hours during and after a bath in Micro-Tek. The nylon halter is the one he has always used. I always try to rinse soap very thoroughly - until the water runs clear. The bath may not be the trigger for the scabs, but they did appear a day or two after the bath.
The temps here have spiked to 60^ for a few days, so there are a few insects out, but not many. We are in PA. Any ideas what would cause these?
I see myself in one of the equine cartoons freaking out about a little bump on the horse. I wouldn't even have looked for these if Fudge had not had such a strong reaction to them.