I don't "store" extra feed. I built large gravity feed feed bins that I installed INSIDE my coops. I only feed treats in the run. The main food supply is in each of the coops to help keep it dry and to keep it away from other animals at night. Each feed bin is large enough to hold about 150lbs of feed. When I buy feed it all goes into the feed bin immediately. I fill the feed bins once every 3 or 4 weeks. It makes feeding VERY easy!