I have four juvenile birds in quarantine after being shipped to me. They started to sneeze, have nose snot( didn't notice if it smelled bad), and one was wheezing really bad. No other symptoms. I figured they had a mycoplasma, which is common when a bird is stressed. I started them on Gallimycin added to their water, bought at the feed supple/farm store. After 3 days I saw a noticeable improvement. I am continuing treatment for 10 days. But you will have to treat the whole flock as it is very contagious.