I have yet to get the coop finished (ok, DH hasn't started it yet) but I don't want all the expense to come at once, so I think I'll start buying some things I'll need. I'm thinking of storing feed in a metal garbage can ( any reason I shouldn't do that?) and maybe the DE as well. How long will these keep? How much should I store for 3/4 hens? I had hens many years ago, but we were closer to a feed store then and could run over whenever we needed.