A new Mercy For Animals undercover investigation exposes horrific animal cruelty at a Tyson chicken factory farm. The hidden-camera footage shows thousands of baby birds living in overcrowded, filthy conditions and bred to grow so fast they often became crippled under their own weight. Many died from heart attacks or organ failure due to their unnaturally fast growth. Workers were caught on video spinning birds around by the neck to kill them and violently throwing animals into transport crates with no regard for their welfare. This is MFA’s fourth undercover investigation in less than a year revealing ongoing and systemic animal abuse in Tyson's poultry supply chain. Watch the video: http://TysonTorturesAnimals.com. Then tell Tyson what you think by commenting under the most recent post on the company's Facebook page: http://Facebook.com/TysonFoods. The birds are counting on you!