Yes, you can feed a higher protein All Flock or Flock Raiser, which is usually 20% protein. But, since it doesn't have the higher calcium that layer has, you'll have to offer oyster shells on the side, and/or you can feed back the eggs shells. There are many, many threads here about feeding back the shells. The vast majority of us do so. Why waste all the excellent calcium? I just air dry them for a week and crush them up. Back into the feed they go. Others, bake them for 10 minutes, but that step isn't necessary, but it does speed the process of drying, making them brittle.