Warning! Gruesome & Shocking Images A new Mercy For Animals undercover investigation provides a horrifying look into E6 Cattle Co. in Hart, Texas. E6 Cattle rears calves for use on dairy farms, confining approximately 10,000 calves and subjecting them to lives of prolonged neglect and misery. For over two weeks in March of 2011, an MFA undercover investigator documented the operation’s deplorable conditions and brutal mistreatment of animals.