Not apologizing or justifying the event with the monkeys, I've had to put down animals that have broken their hind legs, damaged intestines and been gnawed at

Not apologizing or justifying the event with the monkeys, I've had to put down animals that have broken their hind legs, damaged intestines and been gnawed at by local dingo (or wild dog) populations. I _could_ have kept that sheep or cow alive, but the quality of life would be so low that it wouldn't be cruelty. There is a certain point where the compassionate thing is to terminate the life. I imagine some researcher was in the very same position, they may not have been the cause, and they could save the animal but at that point its not going to have any life that isn't all torture for every day of the rest of its life. I kind of envy people who have never had to make these kinds of choices. The fact that it was this bad from a lab procedure makes the situation even more saddening.