9. It makes much more sense to do research in this manner.
I hate it when they mutilate animals and keep them in cages--that certainly wouldn't help determine any real-life efficacy of these prostheses. But when you have a regular pet that gets hurt, and they do the implant, and then the pet goes home and runs and jumps, etc., you have a good opportunity to see how well these things hold up. It might not be completely translatable to humans, but it is certainly a start~!