Most biscuit recipes do not have sugar in them!
Its just flour, salt, baking powder, butter/shortening/lard and milk.
What recipes have you used?
And if you've already got meat and egg working to your favor, that's high protein. If that's not enough, raise the meat/egg to biscuit ratio.
Example: One 20 oz. Steak, Dozen Eggs, One Biscuit.