I thought at first he must have met with the neighbors electric fence, but then I noticed the wound. My neighbor has Dairy
Goats, and after x-mass they get all the trees left over from the lots and feed them to the goats.
My yards not fenced and they leave the eaten bare of bark and all, trees in my back yard.
I own a dog who could trip while standing still, hes so clumsy! Im guessing he ran as fast as he could playing and slid and fell right into one of these bloody trees.