I keep mine on chick starter/grower. I think it is 18%. Just keep oystershell out. I pay about $14 for a 50# bag of grower and that lasts about a week but I also free range.
I should ask about that. I haven't purchased chick starter in a while, but I believe that it's $16 per 50 lb bag. If the protein is the same, than I might as well switch. It would save me $2 a bag and every little bit helps.
Does the chicks starter have the same basic nutrients as adult feeds?