Thanks for getting back to me. Yes he said to continue for 17 days, and I called again and said if I could continue for another week passed that and they said that’s okay. But I’m just worried that past the 21 day mark is too long?My birds when faced with very bad infections were on antibiotics for very long period of time. It depends on how ingrained the infection is. Stopping too soon is as bad as keeping giving it too long. I wish your vet would give you more precise instructions.