My year old Welsh Harlequin duck has been behaving strangely. We've noticed that lately she will temporarily limp or stop to rest on occasion. Today, she had a troubling incident which made me think that she had experienced some temporary paralysis. She stopped walking, stood up very straight, arched her neck in an oddly curved way, stood for a few minutes, tried to flap her wings (which was obviously problematic and labored), and then tried to get herself into the shed where the ducks sleep. When she tried to get into the shed, it was as if she couldn't get her body to move properly. She ran into the shed door as she tried to go inside. I followed her into the shed and watched her. She sat in a corner by herself (see pic) and "recovered". Then she walked over to the other ducks without any trouble and began grooming (she's on the right in the group pic). It was all very weird. Does anyone have any words of advice or similar experiences?