Have you ever known an animal that killed themselves?

First, I understand that some people don’t believe animals can kill themselves. Others believe it and that it might have something to do with genes, encoded behavior to leave this world if ‘death would be of more value than life’.

Last week, a patient going through depression, HIV, cancer, raising two kids alone spoke of his cat that he’s had for many years but that’s lately changed her behavior and last week jumped out of the window and died, even though she always sat by that window before when it was open. I couldn’t help but wonder about the emotional atmosphere in the apartment and how this cat’s death was a metaphor for what was dying inside of him and how he was expressing it.

Anyway, did you ever know or own an animal that exhibited suicidal tendencies as we define them (putting aside whether or not it’s biological or environmental triggers or both)?