Nila the cow (Patreon)

A red headed cow who was abducted by martians and experimented on until she became humanoid and gained sentience. Using her newfound smarts, she attempted to escape, but the martians approached her and had a sit down with her.

Turns out they're not so bad and just found her to be a fascinating specimen. They dropped her back off on Earth where she was now a cow person. A couple of guys found her, picked her up, and now she works in the adult industry as the world's only cow girl model.