I have a Pekin Duck who has flopped on to her back arching her stomach and flapping her wings. She has done this 3 times that I know about. I flipped her over and tried to comfort her but then all of a sudden she just started walking around. She seems real slow but she is drinking water and eating. Can she be having seizures? I had another duck who was lethargic and not moving around a lot so I gave her some apple cider vinegar and now seems well so I am giving this one the vinegar also although I don"t know if this will help. Any information is appreciated. I truly love my ducks and hate to lose one.