I use starter/grower until I get my first egg then I switch the girls to layer. I personally use crumbles. I tried a small bag of pellets but they didn't seem to eat it to well, so I switched back to crumbles, but I started them on crumbles. I smashed up the pellets and mixed it with their crumbles. If I have any starter/grower left when they start laying, I mix it with the layer until it's gone. I haven't had any problems with my big girls laying. I personally use the medicated starter/grower. Amprolium, the medication in feed is sulfa based. Only a problem if you have alergies to sulfa or are super sensitive to sulfa drugs. I give them grit and crushed oyster shells in separate bowls as free choice.