I have a flock of 13 Swedish blues and one pilgrim goose. All are healthy and active except for one of the three drakes, who has been declining quite suddenly for the last few days. I let them outside a couple days ago and he fell off the step, then couldn't get back inside up the step with the others. When he walks he drags his feet and meanders like he's drunk. He won't quack anymore, and today his eyes look a bit runny and milky. No sign of anything in the others. He is eating and drinking, albeit slowly (like he's not coordinated). I did some research and it sounds like maybe botulism, but I can't find anything about his chances at this point. Should I separate him? He gets a bit panicked when he can't get to his flock so I have been hesitant to separate him out. In-coop separation will require some construction but I suppose I could figure it out. Has anyone seen this happen? As an aside, this all came up on the same day I found a headless rooster in the nearby chicken coop. My first thought was that the duck had a run-in with the same predator (weasle? possum? rat?), but I can't find any sign of injury on the duck. Thanks for any input!