I am so sorry Robo. Doesn't it just kill you, when you worked so hard to get to where you are at?! Let JJ help you out with his girls "alayin".
Robo, I think maybe you should try to find the bag and take it to who you purchased it from, with a head count of loss and the worth of those lost. It is worth the inquiry. I would mention too that you are discussing it with other professionals, hobbiests and colleagues in the field. I hate to seem oportunist or money hungry or anything, but the pressure of knowing that you are connected to an entire community of breeders and hobbyists is a VALID PRESSURE that a feedstore or producer should consider. Ask pointed questions about if it happens frequently with their feed? Do many other folks come in claiming they have lost birds to the feed? Just like another post where some of us were "analyzing" LG incubators. Consumers have the right to state their problems with a product and ask for change in it.
I think with a pleasant demeanor and your story and information all lined out, you should let the source know what has happened to you. You always get more flies with honey than vinigar, so keep your chin up and a professional representation and see if they can reimburse you somehow. What is there to loose? If you are the better man, by going in and stating your case in an organized fashion with a good attitude, you have at the very least done the right thing by educating the seller of the feed.
Now, sure, there is the odd chance that your feed molded at your place. Even so, discuss that as the very last possibility and a slim one given that the feed was there a very short period of time.
I feel for you. It is only a matter of time for all of us, that some funky thing happens and sets us back. And isn't it painful. You have had a couple of blows now...the flooding, and now this.
Hang in there bud.
Tonya