I use Nutrena naturewise all flock 20% pellet ( i take a rolling pen to it for littles) 23.95 for 40lbs
I have standard chickens ,bantams , chicks etc through almost a year old.. mine free range i put calcium out as well as chick and poultry grit..i go through about 3 bags per month for 30 chickens
Nature wise "feather fixer" is a higher protein layer formulation - too much calcium for anything except adult production hens. I'll take Purina's FLock Raiser over Nutrena's All Flock - locally its cheaper (Nutrena is a 40# bag, Purina 50#), and Purina's nutritional guarantee is slightly better - but either are fine feeds.