Our QH gelding, Sarge, has the exact same effect on his neck. His hair can look almost curly there in the winter when it is long. It will curl up when he sweats. He is healthy and by the mid summer it isn't as noticeable.
Here are two more pics. The hair is not longer, it just looks that way!! Also, if you close your eyes and pet him, you cannot tell there is a difference. It goes over most of his body, once again, the warmer it gets the more pronounced it is. (Sorry, he was muddy when I took the pics, we had just been cantering in a muddy spot!!)DSCN0669.jpg
My mare has that same thing! I've been wondering what it is because it only happened after her first actual bath of the year. Another boarder told me it might be a reaction to the betadine, but it's just the hair, the skin is healthy and looks normal all over her.
My mare has it on her neck/shoulders but none on her back/butt.
It sure is puzzling, idn't it?? Lol Posted via Mobile Device