We've just introduced our 12 week olds to our existing flock. The existing flock has been getting layer pellets with some mixed in scratch. Up until now the young ones have only had medicated chick starter, except when they are ranging and getting bugs, etc. Now that they are feeding together I don't want to have the layers eating the medicated feed. Are my 12 week olds too yound for layer pellets? What should I feed them together? Thanks for your inputs.