Also..I think my birds are molting. I went into the run today, and it looked like a pillow had exploded in there. I filled a coffee can with feathers. It's certainly not a hard molt, since they still appear fully feathered. They are losing downy feathers underneath their normal outer feathers. When I see them flap their wings, feathers are flying. It certainly explains why they don't seem to be eating as much over the last week or so. It also makes sense a bit, why the one bird with the missing neck feathers, is being picked on a bit, due to the bare neck.
When I checked them over, I found a lot of pin feathers, and lumpy skin where more have not yet emerged. They must all be a bit uncomfortable. The one with the bare neck feels like a pin cushion.