I don't have an answer, but a few suggestions. I found that buying feed online for a small flock is cost prohibitive. Even if I'm getting the exact product I want, it's not so much better than what I can buy locally that it's worth 3 times the price in shipping. Shipping feed is expensive. I look at what feeds are carried locally and then compare them and select the best of those options. I also get to support local business this way. Also talk to the person who does the ordering at your local shop, often they can special order you feed and get it shipped with all of theirs and you can avoid the shipping charges. Generally if you do this it would have to be a brand they already carry, but perhaps a different variety. For example I was able to order a 40lb bag of feed that they only carried the 20lb bag in the store and save some money, or I can order the all flock feed when in the store they only carry the chicken layer. Others mentioned shelf life. One of the things I factor into my feed decision is if the feed mill where it is processed is in state, and all other factors are relatively equal, I go with the locally processed feed in hopes that it will be fresher.