@2ndTink and I spoke though about upping things that silkies get because she's seen some wry neck in her chicks and I see some splayed legs in mine. Upping the E for one thing is more for them, but here she's looking for her large fowl breeders.
Silkies as it is are prone to vitamin deficiency issues, yet, I don't want to OD them either, thus why I don't give the rooster booster granules full dose. 1/4 or less dose is plenty though as proven by the fact that I can't give that same mixed feed to chicks or they'll get the runs.
I, too, am happy with the Kalmbach's Flock Maker, but have been doing this poultry additive for a decade now, assuming I'm helping them. I think it's a good idea to recheck what we're feeding our chickens every couple of years.