Ok, we're talkin' chicks here, & chick crumbles, people, not grower pellets...& I've read that the first 20 days, you feed them crumbles, & then after that you give them grower pellets, & yes, I'll be buyin' 50# of grower pellets, as I know that they'll go through that like a hot knife through butter, but how many pounds of crumble, for 20 days, will 12 chicks need? I'm guessin' 10 pounds, perhaps? As a grown chicken will require, what 4oz a day times that by 20 days & you get 80oz of food for 20 days (or 5 lb). I know that chicks don't require 4 oz a day, maybe a .10 of that? so that would be 8 oz of crumbles per chick per 20 days, multiplied by 12 would be 12 lbs of crumbles, according to my math...throw in some miscalulations, & I'd say 15lbs of crumbles would be sufficient, no?