Cosmo- I appreciate your advice.. as for the flymask, that will be tomorrows investment. Having never owned horses and knowing that there are so many items to acquire to make life easier, more comfortable and safer, I have never caught up to buying everything and therefore buy each piece as needed. Of course if he had an flymask on already this may have never happened.
As for how, I have no idea. I left for work and they were grazing in my 4 acre yard. I will be searching for the area it happened in the morning as there has to be a lot of blood. It was all down his front and legs when I got home.