Last weekend we changed our chicken feed from crumbles to pellets. Since then they have not eaten them. Everyone keeps telling me they will eat if they get hungry enough, but it doesn't seem to be working. One of them will eat a little of it if I break it up in my hand but the other two flat out refuse to go near it. I'm out of crumbles and just opened a big new bag of pellets that I don't want to waste. Help!