Chick culling - Wikipedia, the free encyclopedia
Several methods have been used to cull (slaughter) chicks:
Maceration, using a large high-speed grinder into which the chicks are fed.
Gases or gas mixtures, often carbon dioxide is used to induce unconsciousness and then death.
Cervical dislocation, manually induced dislocation of the spinal column from the skull.
Electrocution, a new method that has been touted as being cheap, reliable, and humane by its developers 
Easy animal to destroy. Too many off them, breads easily, quicker more accurate results.Why are mice always used a test subjects from lab coat freaks and their dirty experiments?!
Wow! You must be a psychopath
Maybe. D::hmmm:Edit: WTF! Was it's heart still beating at the end!?!? oO