So that’s the question, a common one. My specifics: I have 10 pullets, several different breeds, 21 weeks old, one just started laying this week and another soon to follow. I expect the other’s to start laying over the next 4-6 weeks. I need to buy another bag of feed which will last about 3-4 weeks. I eventually want to put them on laying pellets, however I’m considering keeping them on Purina start and grow, non-med with crushed oyster shells on the side for another bag (3-4 weeks). I think that the extra protein in the start and grow might help my pullets continue to develop and those not laying don’t need the extra calcium yet. Or would laying pellets really be best for them as they all start laying.