If he gets about half of what he needs with grains and maybe some BOSS then the layer isn't that bad. With the other stuff cutting the calcium in the layer down to around two percent, that would make it an amount his kidneys can handle. But if you are adding grains and BOSS and no other protein then the protein will come out low for what his needs are. Have you compared the price of BOSS vs. flock raiser. The last time I was in Tractor Supply the BOSS was 20$ for 40lbs.