Is the second feed you give them like an all flock?
I consider it that yes, although we sell it as a layer ration since it is also balanced for efficient laying. (The first feed I mention, but the second feed they're given...man I made that confusing. The 17-19% I would consider an all flock feed if I had to compare it to something commercially available.)
I also whole heartedly second Fred's Hens about animal protein being essential. We use fish meal in ours, and if I ever run out I use Gamebird feed since it's the only stuff I can find that has animal protein.