I'd rather save a human than an animal. Testing is the only way to know if they've really learned the material. Seriously, It's better than testing on humans. And it's certainly better than not testing at all and not developing new medicines. How many humans should die to prevent a rat from dying? And dying from lack of a disease can be just as agonizing for a human as dying from testing is for an animal. Also, The knowledge gained from testing on animal could lead to cures for animal diseases, As well.