Staff members at a local scientific research facility were shocked into silence yesterday, as a transgender mouse tragically ended the career of a mouse that was assigned female at birth during a much-anticipated laboratory mixed martial arts event.

The Wheel of Pain MMA 7 main event featuring Cheeto vs. Nibbles ended in a bloodbath when Cheeto, who recently transitioned to female, knocked out the female challenger in the first round.

Fan outcry was immediate, with calls for the match to be stricken from the record books. "That's a boy mouse!" said one scientist who had his grant money immediately revoked. "You can call it whatever you want but it's still not the same as a girl mouse!"