Abortion should be the woman's decision. Till the 3rd trimester, anyway.

Capital punishment is right in principle. The difficulty is that we can't trust our courts to be right. So, no capital punishment.

Euthanasia should be like all other medical procedures; informed consent should be required. Personally, I'd like the freedom to define my desires in advance, just in case.

War? There are just wars, never doubt it. Pre-emptive first strikes are almost impossible to justify.

The question of experiments with animals is easy to answer but difficult to explain. Pointless or frivolous experiments are anathema.
Cruel experiments are hateful, and probably illegal. If it's the only way to answer a necessary question, then do it. Of course, every one of these adjectives is open to argument. That's the trouble.