Has anyone used their weapon in self defense... on an animal?

We hear stories all the time about people who have to use their firearm in self defense when being mugged or assaulted, but have any of you, or people you know had to use your weapon to protect yourself or another from an animal? (Here in S.D., animals fall somewhat in the same category as people where if a life is in danger, you are within your rights to protect yourself and others) via /r/CCW http://bit.ly/2G5P1BD