Hello! I have 3 free range roosters and currently feeding them a mix of cracked corn and an all flock crumble. I know they shouldn't have layer feed as it contains too much calcium for roosters and they don't really eat the all flock crumble very much that I get them they just peck out the cracked corn. Do I even need to feed them a "nutritional" feed when they are free range? Or would the corn be enough? I also give them some fruits and vegetables in moderation. And as a reference, the roosters are 6 month old barred rocks, we live in rural indiana and also have horses. Just for fun I attached a picture of them in their "bachelor pad" where they sleep every night. Thank you!