I'm wondering what experience other people have with these feeds. I wandered into a store quite a distance from me and found Mazuri Waterfowl Breeder at about twice the price of Layena, but I see online that Mazuri also has a Waterfowl Maintance which I hope would be cheaper. This place also had Manna Pro Waterfowl Ration at about 3/4 the price of Layena. So my questions are: Is the Manna Pro Waterfowl Ration a good product? Does anyone know how Mazuri Waterfowl Maintance compares pricewise with Layena? Somebody mentioned Purina Duck Chow which I cannot find online, or is that be one of the Mazuri products? Any other observations about these or other Waterfowl feeds. I am assuming I could get one of my small local feedstore to ship some in at request, I just hope they don't have to purchase a large stockpile of it, so if I am the only buyer I am not coming back later to buy a stale bag.