You go through 40lbs in two weeks? O_O When I had Virgo and was feeding a combined total of 125lbs of dog, we still made that bag last at least a month, depending on if Virgo had helped herself at all during that time period.
I just bought a bag of TOTW and it was something like $40 or so. Cheaper than the Nature's Variety I had been feeding. I can't wait to switch to full raw, there's a meat dealer out here that is *cheap* and I can get like 3 months worth of food for around what it's costing me for a month or so of kibble.