US fastfood chain KFC has said a lawsuit filed against it by animal rights group PETA is a publicity stunt. People for the Ethical Treatment of Animals (PETA) filed a lawsuit in the California Superior Court in Los Angeles against KFC and its parent company Yum Brands, seeking an injunction to stop what PETA says are deceptive statements on KFC's website regarding how the fastfood firm treats its chickens, reported Reuters.