This is the grim reality of animal testing, which is why it's always important to consider if a product is worth testing for.

Edit, forgot the link: cracked.com/personal-experiences-1676-5-horrifying-realities-testing-drugs-lab-animals.html

Cracked (rip) wrote an amazing first-person account of what animal testing is like. It's basically an ongoing massacre. The animals aren't even livestock or raw materials... they're basically just stationery. Valueless office supplies.