Tyson Foods decided to end its contract relationship with an Oklahoma hog farm after a video of abuse at the farm was released. The video, distributed by the animal rights group Mercy For Animals and shown on NBC, showed farm workers striking pigs and slamming piglets into a concrete floor, and in one instance a worker was videoed throwing a bowling ball at a pig, hitting it in the head.

The farm where the abuse took place was identified as West Coast Farms in Henryetta, Okla.

"We're extremely disappointed by the mistreatment shown in the video and will not tolerate this kind of animal mishandling," Mickelson wrote in an email to The Associated Press. "We are immediately terminating our contract with this farmer and will take possession of the animals remaining on the farm. We're serious about proper animal handling and expect the farmers who supply us to treat animals with care and to be trained and certified in responsible animal care practices. It's consistent with our core values to 'serve as stewards of the animals 'entrusted to us."