Hi, I have 100 birds, they are the slow grow meat birds from Freys Hatchery (all roosters) just started. They are currently on Masterfeeds 18% medicated starter ration. I was wondering if I can raise them after 4 weeks on some of my remaining custom ewe ration, which is 14% with added whole sunflower seeds and xp yeast.( I still have 3/4 of a ton left). It is mostly whole mixed grains(oats,barley), with cracked corn. No soy. Would I need to add some containers of grit to help them with the whole grains in it? Would there be enough protein for them? They are currently housed in a 8x8 pen with heat lamps and lots of feeders/waterers. Once feathers are in it will be opened up to a 13x36 area with access outside.