Family feud is just a survey of 100 people so it's not important whether or not they actually slap a cows ass but more how prominent that idea is in people's heads. I've definitely seen it done in the media, mostly cartoons, but I wouldn't want to do that to a cow in the real world.
When trying to get them to move sometimes, but I'm not sure what else this might refer to. I mostly just watch youtube videos of people doing pasture-raised beef and the occasional hoof-trimming videos, so I'm not sure.