I have a duckling who is now 6 weeks old and started having trouble walking at 2 weeks old. She has gone down hill since ,progressively getting worse. I have been giving niacin and b complex along with a number of other supplements. initially she got better then after two days regressed. then started to be able to walk with assistance then one day overnight regressed again and would hold her left leg up in the air when I would hold her. she can put weight on it when she wants to but won't if I am touching her. took her to a vet. x ray did not show anything broken. did a stool sample and chlamydial sample and everything came back clear. vet thinks it's neurological but no answers as to what it could be. her body now seems twisted when she stands but wasn't before last week. She is currently on metacam for pain and doxycycline. She was swimming a lot at first but she can't preen herself so she gets waterlogged very quickly. I can't spend thousands of dollars on a vet( already spent $500 with no real answers) Could really use some help or advice from those who may have had similar experiences.