Johnson's animal rights homework

I think doing some experiment on animals is just right. Though every animal have its right, it can reproduce much more descendants than human beings. As long as we don't do experiments too frequently, animals can provide more and more specimens for us. We eat pork, beef and chicken every day. Killing some for experiment is not cruel. If we discover any anti-virus from pigs or cows, our medical quality will be better and our lives will be longer. By the way, pigs' organs are similar to human beings'. So we can discover something for helping people from them more possibly. After all, animals are more suitable than human beings to be experimented.