I just got back from the feed store and I realized I bought a 50 lbs of feed and not layer pellets that I've been feeding my pullets. Is one type better than the other? If all they had was pellets, will they eat the feed? It looks like sand to me and I don't know if older birds or larger pullets should be on pellets and not feed. It has the same protien content and so forth. Thank you in advance for any answers and opinions!