I have 3 Pekins all females, 2 Rouen drakes, and 2 Rouen females. Every winter they all I swear lose at least a pound each sometimes more depending on the bird. They live basically during spring/summer foraging for bugs, plants, and fish in our pond. They are huge and fat during this time and much happier. We provide them during the whole year a mix of grains, wheat, crumble and whatever else our AG store puts in the mash we have had them on since forever. (Recommended by our AG who we trust greatly) THEY WON'T EAT IT! They don't touch the stuff in the summer at all. I have switched to everything I can think of. They barely touch veggies, or anything I give them. I am going nuts with these stubborn birds. The 3 pekins used to be the only ones I had and they ate everything I would give them loved it, until I bought the other 4 from a lady that just let them literally free-range, no pen, no shelter, they basically lived on her husbands trout stream, and she said she lost a lot during the winter. She explained that she fed them "wild bird seed" I didn't look at the feed but around here that means like the bird seed you buy for wild birds like blue jays and Robbins. I am not sure why my 3 Pekins stopped eating it except that the drakes will just push the food away so not sure if they see it now as something bad to eat since ducks can be so picky about their food. And when I mean push it away these 2 boys stick their head in the buckets taste a bit and then start quacking away at each other and my one drake begins to push the bucket away! I wish I had a video camera to show this behavior! The only thing I can get them all to eat is of course CORN UGH!!!!! I have come to the conclusion that I think these 7 ducks are going to cost me an harm in a leg to feed during the winter with worms, corn, veggies, and fish occasionally. I just don't know what else to feed them! Has anyone else had this happen? I think the worst part is they look at me every time I let them out like okay so you going to feed me now Can you sustain your ducks on Wild Bird Seed??! ** Also I have went 5 days without giving them any treats (veggies, corn, worms, etc) only leaving our mash we have and it was basically pecked at! For that many ducks I should be going through so much more food!