Are they on medicated starter, and are they outside on your ground? Gradually transitioning to either an unmedicated starter, or an all-flock feed will be fine if they've already had a couple of weeks on your ground and in your coop.
I'd recommend a feed with 18% to 20% protein for their lifetime, with oyster shell separately offered for the laying hens.
What you buy will depend on what's available fresh where you shop. Here it's Purina Flock Raiser, my choice, but you may find something else.
Thank you so much I really appreciate all your help!It's fine for them to eat the medicated starter, no problem. If they've been exposed to your environment for a couple of weeks, they have had time do develop some immunity to whatever your coccidia load is, and so they can transition off that feed anytime.