Dagny,
You just need a couple of monsters like this. I don't know how many months a medium size bag of food lasts but my best guess is that we have a minimum of about three months worth on hand at any time. wink

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"There is not a man of us who does not at times need a helping hand to be stretched out to him, and then shame upon him who will not stretch out the helping hand to his brother." -Theodore Roosevelt