I love doing dissections. Any opportunity that comes up to do a dissection, I've jumped on it. I think its a way better way to learn anatomy than any virtual tool. Before vet school, I worked at a shelter and part of my job was euthanasia technician so I feel like I'm ahead of the curve when it comes to handling emotions regarding euthanasia and deceased animals.
I just assume any of the dogs we've had in vet school have the same story as the other dogs I've euthanized whose bodies just end up in a barrel then tossed in the incinerator: got as a puppy by someone who didn't train them or socialize them, then didn't have time for them/moved to a place that didn't have dogs when the dog was about 2 then took them to the pound. That to me is far more sad than a dog's body being used to educate future vets. The euthanasia of healthy *adoptable* animals upsets me, not the usage of their bodies. But thats why I want to be a shelter vet anyway.