Is it a sin or boon to conduct toxicological tests on Animals ?

Experimental research with animals is usually conducted in universities, medical schools, pharmaceutical companies. Animals and human get many of the same illnesses. Animal research usually describes research involving vertebrates, such as cats, mice, frogs, pigs, and primates. All medical research is carefully planned, and this includes medical research with animals. Under federal law, all animals must be treated humanely and undergo the least distress possible. Medical research with animals saves Lives. Dog-discovery of insulin, monkey--polio vaccine, mouse--rabies vaccine, pig---skin grafts for burn victims and computer-assisted tomography (CAT) scans, rabbit-- corneal transplants, rat--carcinogen screening.(National institute of health) (NIH). But by doing experiments on animals, knowingly or unknowingly, willingly or unwillingly we are, Poisoning, shocking, burning, and killing animals is all in a day's work for vivisection. If these atrocious acts were committed outside laboratories, they would be felonies. But animals suffer and die every day in laboratories with little or no protection from cruelty. This is the debate of the article, Is it sin or boon to conduct toxicological tests on animals ?