Not an option at this point, unfortunately.
No, no, no... Nothing is added. The chick's mass gain is from conversion (not the right word, I'm sure, but close enough...) of the yolk and albumin. Calcium for bones comes from the shell, which is why, in high school, we dissected eggs for embryology instead of having the eggs develop in jars (which some classes do, but you can't track normal development after a certain point).
Ironic--after how good I was at dissecting eggs a few decades ago, I couldn't bring myself to eggtopsy a few weeks ago--though that was as much fear of possible stinkiness than anything else.
Right! The 14% takes into account the growth of the chick and the conversion of all the fluids into the chick!