I have a peahen who started limping a few days ago. It has gotten worse, so I caught her and checked her foot out. It is swollen and she acts like it is painful. I don't see any cuts/scrapes/ or any kind of injury. should I put her on antibiotics?? and if so, which one?? I have her in a small pen by herself so that I can check on her and treat if needed. Otherwise she is free range and comes in at night to roost.