Oh, I agree, but when my ducks started to have significant laying problems, I caved.I've never allowed my kids to be picky eaters and I'm certainly not putting up with picky chickens.
They eat what I put in the feeder or go hungry.
They use the calcium I provide or they don't get any.
They always choose to eat what I provide -- though when it comes to calcium they'll ignore it for a while then suddenly eat it all and then back to ignoring it for a while.