I got some small bags of sea kelp to try it out, I'm adding it to my FF to see how it works out & then if I see good results I will order a larger amount. I'll let you all know later on if I see improvements in the birds from it. You only feed 1/4 cup to 11 pounds of feed, so it goes quite aways. I will mostly feed it to my breeding stock, but if I buy a bigger amount will also feed it to my laying flock.