We've had Muscovy ducks for about 3 years now, and probably a couple hundred ducklings hatched. In fact, one of our hens got a bit off-cycle this year and hatched a clutch a couple weeks ago with snow on the ground. Every year, we'll have a few ducklings get what we call "Floppy Duckling Syndrome" at a couple weeks of age (we have one now). They'll lose control of their head, feet, and wings. They get limp and twitchy and can't stand or eat. We normally quarantine them, keep them warm, and offer food and water (though they can't eat or drink). Usually they die, though we have had one who had this at the one month timeframe survive. No luck finding much information on what it might be. Since it's a recurring theme, we're wondering if there's any ideas out there about what we might do to prevent it. Perhaps a vitamin/mineral deficiency or a parasite? At the age it happens, they're normally pretty isolated, and I don't think it's likely they're getting into something they shouldn't. Any ideas? Thanks.