I feed my hens a layer crumble but the brand that I bought this month seems to have more "crumbs" than usual and they are refusing to eat it the crumbs. It is fresh, non-moldy etc...are they just being picky? They eat the crumble until they get to the portion that is more finely ground. Do I leave it in their feeder until they eat it. I really don't want to waste the feed and don't want them to get into the habit of thinking they have a choice