I will update with more symptoms and video as we go, but we have a three-year old silver Appleyard who does not appear to be well. She is the girl who is bonded to our drake, and during the day, we often leave her (by her insistence) with him. Tonight when I went to let her out, she was unable/unwilling to walk and was sort of scooting along the ground pulling herself by her bill. I brought her to her little pool and she is kind of chilling in there and drinking and looking better. She just had what appears to be a normal poop.