My almost 6 year old Buff Orpington hen Cupcake is breathing heavy and has a watery nose. I just noticed yesterday although I think she may have had this a few days before I really noticed it. Yesterday it was just a tiny squeak o her nose like a slight wheeze. Today she's breathing much heavier and has a watery nose and watery eyes. Non of the other hens have any of these. I thought maybe egg bound from the breathing and tail moving so I checked she isn't egg bound but her belly feels like a mid full water balloon. :/ What does she have?