If scientists can find a way to make cloning animals for body parts work,
there is no reason not to do it. People eat animals, as well as fungi and plants,
and most people accept that one must die for another to continue living for
a while. If it is moral to slaughter animals, assuming they were raised and
killed humanely, then it is moral to use their body parts to extend a human
Using cloned animals as a means for human transplants sound dangerous and very risky. I would imagine there is a possibility of all kinds of errors and ways for things to go wrong. Putting animal organs in a human in general sounds like it would be likely to fail or have low success.