I was wondering what the usage of this product was and where most people get it. Is it prescription only? How about Rooster Booster? I have a hen who is fighting some kind of bronchial issue...has lots of congestion in her chest and is sneezing but no real drainage or other problems. I've had her isolated and been giving her duramycin and aspirin. She seems to be getting a tad better but I was wondering if this VetRx or Rooster Booster might be an extra booster for her.