If you fed nothing but a 18% layer and nothing else, you would do just fine. They would be healthy, and produce very well. Scratch is mostly garbage and empty calories. I don't even waste time using it.
Me personally, when running a layer flock, I prefer a 15-16% layer ration. But then I feed a quality grain free dog food. Few times a week. This jumps the protein way up plus it gives the fowl a good animal protein amongst other things.
I've tried other methods through the years. Simpler and much more complex. But for a general layer flock keeping it simple is the best route
Me personally, when running a layer flock, I prefer a 15-16% layer ration. But then I feed a quality grain free dog food. Few times a week. This jumps the protein way up plus it gives the fowl a good animal protein amongst other things.
I've tried other methods through the years. Simpler and much more complex. But for a general layer flock keeping it simple is the best route