that is the best pic of have sorry.
as soon as i saw it i knew it was a bite mark, it looked like when you take a bite out of a sandwich. here is my opinion, the coyote chased the doe and lunged at its neck and when it did the doe dropped its head and the coyote got it in the nose. i would also think from that position that yote probably took a couple of kicks with the front leg, maybe why it got away. who knows, it may not even be a bite mark but it sure looks like one.