He didn't say snotty, though. That's a whole other ballgame. If respiratory, I will not treat. You dont even know if it's viral, bacterial, or she just has a piece of something in her windpipe or has blown an airsac. Blindly treating with very weak antibiotics (terramycin/tetracycline) will just waste money, IMO. You realize that viruses dont respond to antibiotics at all, anyway.
The usual protocol is to isolate and observe and provide supportive therapy till you can determine what the cause is. Supportive would be warmth, water with unfiltered ACV in it, extra protein and quiet. If it's something stuck in her windpipe, it may work itself out. If it's respiratory illness, let her immune system take over and kick it out. If it won't do that, she is probably constitutionally weak anyway.