Is it immoral to perform scientific experiments on rats?

Pretty much, yeah.

Rats are not ethical subjects so no, it's not immoral to perform scientific experiments on rats (provided you own the rats or you are using them with permission of the owner).

How is that a scientific question?

Questions of good and evil, right and wrong are commonly thought unanswerable by science. But Sam Harris argues that science can — and should — be an authority on moral issues, shaping human values and setting out what constitutes a good life.

Just use albanians

I once used my neighbor's negro for an experiment while he was away, assuming it would be fine. Unfortunately experiment killed him.

I end up feeling bad about my unethical behavior in the longrun, and have to pay the guy to go get a new one. Oh well, you know?

but a negro is an ethical subject so your argument is invalid.

HA well done lad

So what you're saying is that we should engineer rats to have emotional and logical thought, give them the ability to make scientific advancements, and check to see whether they perform those experiments on fleas to determine whether or not to do experiments on rats? I love it.

Of course not, neither are you.

You're not me, why would I care about your suffering?