Thank-you so much for updating this thread! That is truly wonderful news and I am so glad everything has worked so well!Oh my god, I completely forgot about keeping you all updated! I have lost no more chicks, and they are all doing fine. They are still on the medication above and I see almost no congestion now. Those doses seemed to have worked well, and I would strongly recommend them to others who are seeing a big sickness going through their flock.
Thanks so much for your help guys!