I have a 9 month old female duck that was attacked by an animal a month ago. Originally when I found her after the attack she could not use her legs at all. She had a puncture wound that had become infected under her wing that I treated with veterycyn spray and several doses of penicillin. After 3 weeks of rehab she was able to stand and waddle fairly well with a great appetite and perky personality. I put her back with my other 9 ducks five days ago. She seemed to be doing well until the fourth day when I found her out alone about 20 feet from the pond where all of the ducks spend most of their time. She can't seem to control her head or neck and is have trouble getting to the food and water dish. She almost looks like she is twisting her head and neck so that it's upside down. She cannot use her legs and just flaps her wings to move sporadically. I'm wondering why she is having such trouble when my other ducks have thrived down at the pond and been there for almost two months now. Is she particularly sensitive to the elements? Poisoned? Vitamin deficient? They are all on a mix of crack corn and all flock pellets.