Hi! My 6 year old hen, Violet, has been acting a bit weird lately. When she's roosting, I've noticed that her tail moves a bit as she breathes and she seems a bit more reserved than usual. Thinking it was a respiratory issue, I've been giving her Duramycin in her water for 5 days, but it hasn't done anything. She doesn't seem to have a runny nose or eyes. Any help would be really appreciated!