Call the co-ops around you and find out how many pounds their minimum order would be.
Okay, next dumb question. How do you find a co-op? Everyone always talks about them but I've never seen one. I have access to Atwoods, Orschelns, TSC, and I used to go to a feed store in Wichita that wasn't part of a big chain, but I've never seen anything calling itself a Co-op. I tried looking in the white pages but didn't come up with anything.....