Ears cut in half

[Haro450]

My dad killed a Antelope a couple years ago the ears look like they where cut in half. Bio said could have froze or some times cowboys catch a fawns a band them or in this case cut the ears off. Anyone ever see this type of thing before? Its a very clear strait line. Just interested if anyone else has seen this before or something like it. Ill post a picture of the mount.