Coming up on the 6 week mark, and the birds appear healthy, just not growing as fast as before. I am geussing it is the heat. I wont let them out of their tractor until the first two feedings are all gone, then they get to freerange all day. I do move the feeder and water to where ever they go, usually have to move it twice a day as they follow the shade. I am thinking that they may need to stay in the tractor for the last two weeks and do nothing but eat feed? Open to insights and suggestions. Not really looking for a 12 pound bird but would like to see all of them 4.5 to 6 pounds dressed. They range from 3 to 5 now....still on the 4th bag of feed since the day I got them. These guys freerange just fine here! I know the weighst are a tad shallow due to the freeranging.....but they sure seem to be healthy.