I have 15 chickens, 2 turkey's, and 4 ducks in a free range chicken yard that's 40' x 150'. They have free access to the feed and water. Here's the thing. They go through 50# of feed in 4 days. I want upwards of 100 chickens but not if they're gonna eat like this. Am I missing something or are chickens just hungry hogs? I don't think my real hogs eat this much. Any ideas or suggestions?