I used chicken layer pellets from start of season right thru the year.It was a 17% proteine one.All my young birds was in top con.The only thing i would say is,the droppings is a bit loose.I still use it and will keep on doing so,the only thing is i add a few peas,beans,barley and small seed as i need it.
(This might be wrong,but it works for me)
andrecrock