This is an open bug that was archived. I am not sure if a new bug report is meant to be made.
Animal aging is turned off in options. Aging is turned off for all sims.
I have a save file I have p...
Ideas
I have had my animals die, but with aging on. They simply all die soon after loading the lot (llamas, chickens, mini goats). I think they're dying too soon and it seems to be a repeated problem. I play rotationally which may have something to do with it.