Chicken giant Tyson Foods says it will retrain all of its workers who deal with live birds after an animal rights group released hidden footage from within its facilities on Wednesday, USA Today reports. According to the Washington Post, the video from Compassion Over Killing shows workers choking, punching, and kicking chickens, plus running them over with forklifts and leaving them in piles to die. One worker in the video says it's "inhumane" to kill a chicken by stepping on its head while he kills a chicken by stepping on its head. Tyson calls the behavior "inexcusable" and says it fired 10 employees at the Virginia facilities shown in the video. Animal rights activists have infiltrated Tyson Foods to film such videos at least five times in a little over a year. (More Tyson Foods stories.)