My local feed store recommends flock raiser, which is 20% protein crumbles, for the first 3 weeks and a finisher for the remaining 5 weeks. They do not carry any broiler-specific feed. Both are the same price ($19/50 lb bag). Does this sound right? First year raising meat chickens, and I'd like to have all the feed already bought before they get here. I'm starting off with 25, I've read they'll eat about 13 lbs of feed over their lifetime, so about 325 lbs overall, or 7 bags. Sound right? TIA!