This already happened, but I’m still not sure if I made the right decision. I love my cats very much, and when one of them, Smokie, died of cancer, I didn’t want the second one to always wonder a) If the cat had abandoned us, or b) If the cat might come home one day, etc. That being said, I showed the other cat, Claws, Smokie’s body. He became terrified, hunching and showing the whites of his eyes as he sniffed Smokie. It is a really painful memory, but I’m pretty sure it was the best choice.