(This video contains graphic content.)

A Tyson Foods farm in Tennessee shows a chicken being beaten to death with a metal stick while others are seen limping around and are forced to live in poor and overcrowded conditions.

The chicken from T&S Farm in Dukedom, Tennessee was used to make McDonald’s chicken nuggets. An investigation has gone underway after Tyson Foods and McDonalds discovered the video.

“Members of our animal well-being team are investigating, however, based on what we currently know, we are terminating the farmer’s contract to grow chickens for us,” said a Tyson spokesperson in an email to CBS 6.

Animal advocacy group Mercy for Animals went undercover to the Chicken McNugget supplier and filmed the conditions at the plant. The graphic video shows chickens being beaten and mistreated.

The investigator working for Mercy for Animals  was hired by T&S Farm and worked there during July and August. During that time, he captured the horrific treatment of the birds.

Since this video has emerged, Tyson Foods has terminated their contract with T&S Farm and McDonald’s supports their decision.

“We believe treating animals with care and respect is an integral part of a responsible supply chain and find the behavior depicted in this video to be completely unacceptable,” said McDonald’s in an email statement this morning. “We support Tyson Foods’ decision to terminate their contract with this farmer,” says a spokesperson to CBS 6.