This is because different animals are subjected to different scientific tests, tests that people do to test if the drugs or formulas work and instead of doing tests in humans they do it in animals, dial to avoid hurting someone, but, Have you not thought about the damage they do to nature and each animal that uses science for their experiments?
I agree with you,i believe that some of those tests could have results which lead to something dangerous e.g virus....@genepop
if so, all this has consequences and they know it but they don't do anything about it, they just keep doing the tests.