A while back I sold chicks to someone who said she was replacing ones she purchased the previous month. I asked what happened and she said her pigs ate them. She had already packed my chicks up, so I didn't unsell them. She reassured me she had a proper enclosure this time. A little while later she said they were still well, so I was relieved she wasn't buying chicks and putting them in danger.
Now that I think about it, some people don't feed their pigs anything but scraps and poor pasture. If given an opportunity a hungry pig will eat feed, chicks, eggs...
What's the trick to encoraging a chicken to be broody? The longest I've had anyone sitting on eggs is a few hours. They clearly aren't ready to stay broody. I just wish one of them would be. I was thinking about building a few nest boxes in different locations to see if they'd prefer a more private location to brood. Would that help?