One of my hens was acting sick today, so I put a couple drops of polyvisol vitamins (without iron) in a jar with about a tbsp of water. I put some on her beak (not more than a 1/4 tsp) and in 5 minutes she had convulsions and died! Did I kill her by giving the vitamins to her? I knew she was sick, she was standing alone hunched up and not interested in treats. She wasn't laying any eggs, molting right now. I feel horrible, if only I had just waited and watched, maybe she would be alive. I can't save her now, but maybe this could be a warning for someone else.