I bought some game bird feed for the higher protein content while the birds are molting. Some of them look all filled out, but the rest are either in the midst of it or just starting. I'm mixing the game bird with their regular crumbles. How long do you think I should feed them this mix? Their egg production is way down, only one or two eggs every other day from 14 hens. I don't want to compromise their need for calcium if they're going to ramp up egg production anytime soon, should I just supplement with oyster shell? Experts, what do you think?