That *does* sound grim. I've been in an abattoir for meat for human consumption and that's pretty unpleasant, one for condemned carcasses is even worse.
Have you heard about the new guy at the zoo? He has to feed all the animals, an old hand tells him how to carry on. The basic advice is "if anything goes wrong, throw it to the lions, lions eat anything". Off he goes, cleaning out the tropical fish, but he spills the water and by the time he's sorted it out a few are dead. The old hand says "never mind son, just be careful next time, throw the fish to the lions, lions eat anything." On they go, cleaning stuff out, feeding animals. He fouls up again in the chimpanzee enclosure, reverses a tractor over a few while they are eating. "bloody hell" says the experienced chimp minder,"take it easy with the tractor. Look, get them in with the lions before the boss sees. The lions will be fine, lions eat anything." On they go, into the beekeeping section. Unfortunately in here the bees swarm, he gets stung and loses his temper. Next news is that he's smashed the hive and about 1000 bees have been stamped on, they are stamped to a pulp. No surprise where the debris goes. Lions eat anything.
Later that day a new lion is delivered from another zoo. He asks one of the existing lions about the food. "Not bad really, fairly varied. Today was good, we've had fish, chimps and mushy bees!"