I've noticed it's used a fair amount in jest. Like at the end of Wallace and Gromit (a sort of animated thing about a man and his dog using plasticine models) it says "no animals were harmed" when obviously they weren't because they're, er, made out of plasticine.
I was chatting to a woman at a party who works for an advertising company. She worked on an Andrex (toilet paper brand, their mascot is a golden labrador puppy) advert and said there were vets supervising it and every five minutes or so they would express concern that the puppies were getting tired of all the frolicking in toilet paper and insist they had a rest. It was a cute story, I was pleased to hear they took the welfare seriously.