A few years back I helped track a buck with a buddy. When we found it his ears were like that, looked like they'd been cut off with shears. We assumed frostbite, but it was very strange.
Frostbite would be my initial thought as well, but then again it seems as if it should be more common if so. Can't say that I have ever seen or heard of someone else mentioning it. Maybe something that happens with late born fawns and early cold shots, ears aren't fully developed for the cold?
Definitely frostbite. The ears help cool the body but also take a beating if temps get low. That's ok she will taste just fine.
our winters are brutal. I have a scenario how the ears are perfectly in line with each other. if this deer is burrowed down in her bed under two feet of snow and the snow line is at the perfect height. the length of her ears that are above the snow line got frost bite as you all have mentioned which made them fall off.