I think you're right Snipe. I remember asking one of the biologists at Keystone this same question several years back. IIRC the answer I got was there is a difference in providence between their FHM and Tuffies. Keep in mind, this is going by my memory and I am older than Pat W's Falstaff beer supply! The FHM are pond raised and may have a few stickleback mixed in. Their Tuffies will be pure FHM and produced in a more costly procedure. There is a price difference. I will be interested in Mike's reply. I always get the FHM as I don't mind a few stickleback.