We have a bit of a mystery on our hands. We have a flock of about 30 ducks, about 7 are drakes. For awhile we were getting a lot of eggs, around 8-9/day then as the summer went on we went down to to 3 eggs a day, then 2, then 1 ... now nothing. At night they are enclosed in a large square pen that is at least 20' x 15.' One corner of the pen is enclosed. We have 3 large dog crates with lots of hay and a fake egg in each. We also have a row of nest boxes along one wall that is also under cover. We let them out every morning around 5:30am or so into a 2 acre pasture they share with some other poultry (about a dozen chickens, 4 geese, 3 guineas and 6 turkeys). They're pretty good foragers. For awhile we were only giving them a night time ration of food (about 5lb scoop of Layena with some cracked corn), but we've started feeding them twice a day. They have 3 large kiddy pools in the pasture and large tubs of water in their pen at night. They get penned up at dark. At least one day a week they are penned all day, as we don't get home until very late (8pm) and don't want to risk predators. There is a small light in the enclosed area of their pen that comes on at dark and stays on all night. (We have also tried keeping the light off at night.) We did have a rat problem, but we've since taken care of that (we think). We do have some cottonmouth and rat snakes on the property, but I think we'd have more signs that it was snakes (pooped out crushed shells or something). What we've tried: 1) Keeping them penned for a few days. Not a single egg. 2) Increasing their feed ration (been doing that for a month). No change. 3) Putting fake eggs in the nest boxes. No luck. 4) Palpating the hens. Pretty sure we feel eggs in there. 5) The laying did seem to drop off when we had geese housed with with the ducks, so for the last week the geese have their own pen at night. Possibilities we've considered: 1) It's getting late in the season. However, the temperature hasn't dropped too much (south Louisiana) and our ducks for the past few years always layed well into the winter. In fact, we've been careful about our breeding because we usually get about 300+ eggs from our girls. 2) They might be laying somewhere else. After penning them up for 3 days we thought that might show us at least one egg, but nothing. Can they "hold it" for that long? 3) We may have parasites. However, the ducks all seem healthy. We've been raising them for years, just never a flock this size, Questions: 1) Could we have an egg eater? We don't know too much about that. Would there be any tell-tale signs? Any way to figure out which one it is? Would they eat through almost a dozen eggs a day? 2) Could it be that they can hold the eggs for a few days? Would keeping them penned for a longer period of time like a week be better? 3) Are we not giving them enough space? 8 sq ft per bird seems like plenty to me. 4) Are we not feeding enough? Is two big scoops (about 8 lbs average) of Layena/corn enough? We were hoping by increasing our number of hens we'd be able to start producing more duck eggs for sale. I suppose we should be getting about a dozen a day from this many females, but the complete lack of eggs is disappointing. I feel like I'm just throwing away feed at this point. Our chickens and quail are laying okay (dropping off a bit for cooler weather, I think), so I figure if it was rats/snakes or something affecting birds (parasite/disease) we'd see it in all the birds. Any help? Suggestions?