It depends on the chicken: how big it is, whether the chicken is growing or molting or laying eggs, what the weather is like, and how efficiently that particular chicken uses food.
Do they eat it all, or do they stop at some point?
Are you feeding it dry, wet, or fermented?
I would start by...
Chicks molt frequently as they grow.
Chick starter has everything they need for growing AND molting.
There is NO NEED to add extra protein or supplements when a chicken is molting while eating chick starter.
If you want to be really sure, just give them chick starter for their feed.
(I assume...