I think – yes. I have seen it first hand and there is no question in my mind that at least some horses do. The following words and pictures are both very touching and sad and the picture is both very touching and a bit gruesome.
If you are squeamish about the sight of blood you might want to pass.
I posted it here because I think it is mostly touching and because I think people need to be reminded that animals are sentient beings and have feelings just like us.
Building Respect Thru Confidence & Trust