Hi, it's my first year raising chicks and I will be getting 30 meat birds(Cornish rocks) I've done some research and understand they grow very fast and can have health problems due to their fast growth. I am raising them organic feed so no medication. Can I feed them the layer chicken starter instead of the broiler mash so they don't grow so fast and can be healthier birds? My sister in law did not have much luck with their Cornish broilers and I'm hoping I can do better with mine. Any suggestions for a first year bird lady!