I have a chiken who went from falling down to pretty much crippled, just her, and nobody else in the flock is acting ill. I thought she got injured until researching, and it sounds like it might be a vitamin deficiency? With that said, I went to Wal-Mart, and the only poly-vi-sol they had was with iron. I live in a very small town, and Wal-mart is my only choice. I'm assuming I can not give that to her??? I also picked up Liquid B complex. Would that be safer to give? She's been like this for a few days, so I need answer soon, so I can give her some immediately please. Thank you in advance!!