I buy 30% Gamebird grower. I use it for my Cots and also for the layers. I'm giving scratch right now too, so the grower helps add some protien that they could be lacking. Also I hadn't had an egg in a couple of months and once I started them on this a couple have started up. No added lights. Not the quail though, I have to add lights to them soon, cause they eat like pigs without putting out a single egg.