I have 150 ducks, 200+ chickens(layers and meat birds), 4 geese and 33 turkeys that free range and are housed together in a large open barn. I start all of my hatchlings together on 22% game-bird and poultry feed, until they are 3 weeks old. At that time they go to the barn into a 10x10 dog kennel, set up in the barn, with chain-link fencing panels, the bitties can go through easily, but not the adults. feed is reduced to 19% poultry feed, until they go in with the adult flock, when they can no longer fit through the fencing. The turkey poults do not go out until they are 6 weeks old, because they are a little more fragile more susceptible to a sudden chill. When my birds go into the adult population, they all get, corn, laying pellets, and mixed whole grains, plus treats of fresh veggies and fruit leftovers or over-ripes from our 100% organic vegetable garden and fruit orchard. I usually have a bucket of oyster shell available, but never mix it with feed. They will consume what they need. I also through egg shells from the incubator and kitchen out the door and they will gobble them up. If a hen goes broody and sneaks off to hatch a brood, when she brings them home, I will give her a hiding place to keep her bitties, but she can take them for walks to explore and she will usually ween them in a few weeks, when she has taught them flock edicit. When I put on the security lights around dark, they all start for the barn. Most of the chickens have started to roost by then, followed be the ducks making their way out of the pond and the geese bring up the rear. The turkeys usually like to roost on the highest places they can find outside, except in bad weather. I go out about dark thirty and close the barn doors. In the morning when I open the barn doors, they come out in reverse order, geese & ducks straight to the pond, then the chickens to the pasture with the turkeys. I feed them around noon and about 4pm. This is what works for me. Out of the 120 chicks I put out about 2 weeks ago, I lost 3 chicks. I feed no medicated feed and have very good immunity with my mixed flocks. Some of my turkeys got fowl pox this summer, but not one other problem in over 7 years with my mixed flock. Fowl pox is not a serious or life threatening virus and I have not lost a single turkey. I hope this helps.