High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Stop Huntingdon Animal Cruelty (SHAC) is an international animal rights campaign to close down Huntingdon Life Sciences (HLS), Europe's largest contract animal-testing laboratory. HLS tests medical and non-medical substances on around 75,000 animals every year, from rats to primates. It has been the subject of five major leaks or undercover investigations by activists and reporters since 1989. SHAC was started in November 1999 by British animal rights activists Greg Avery, Heather James, and Natasha Dellemagne after video footage shot covertly inside HLS in 1997 by PETA was aired on British television. The footage showed staff shaking, punching, and shouting at beagles in an HLS lab.