She came home with her ear hanging off, and gave her head a big shake, and the tip just flew off!

eek! 😱

It’s a very clean cut for a cat fight cut

I have seen cats with equally clean cuts on their ears that were definitely from fighting - although maybe not as much of the ear missing as she's got! Clipping ears to indicate a cat is spayed sounds kinda brutal and old-fashioned, I hope no one really does that anywhere!