I found a deer once that had an abcess in her mounth. Not sure what caused it but she starved to death. Her jaw was somewhat swollen but she couldn'teat for sure because of the infection.

Hopefully it not CWDeither way I'd check with the conservation officer and ask him what you should do before shooting her. They may want you not to kill her though I'm not sure why. You just never know. Talk with them first to be on the safe side.