Hi, my new batch of chicks are between 12 and 15 weeks of age and are a variety of different breeds. I am going on a week trip soon and was wondering if I could put them in with my big chickens because the chicks feed and water containers won't last them. I am also out of starter feed. Will eating layer feed this early be harmful to them? I usually switch them at about 16 weeks so this would be a little early. I have had to switch previous batches at about 13 weeks before do to a un-predator-proof chick coop. Thanks!