My zoo buries them on the premises. I know of a camel, a moose and a few other things got buried there. They have a large plot of land that is used to dispose of organic waste like branches and trees, old compost, etc until it’s full and needs to be tricked out to the landfill. They just bury the animals under the ground there.
Also damaging to businesses… I already knew about the butter recall and then saw this. My brain automatically filled in ‘peanut butter’ when reading because of the photo, and my first thought was damn, Costco fucked up again? Maybe they are going downhill in quality. Until I read the comments to realize I should reread that.