Chick starter is probably fine, you have to buy what's fresh and available where you shop. Here we can get Purina's Flock raiser, and we've been feeding that for decades.
Mary
But feeding a layer diet, high in calcium, is a poor idea. And I too like to feed a 20% all flock diet to everyone, with oyster shell on the side.
The Flock Raiser I've been buying for decades is going up in price almost weekly right now, which offends me too. Currently I'm mixing it 50-50...