I just incubated and hatched my first chickens 4 days ago. 16 hatched and all seem to be doing really well (drinking, eating, sleeping, etc). I noticed today that 2-3 of the chicks are sneezing. Since I am COMPLETLY new to this it has me worried after reading about all the diseases and such. They are in a baby pool on a sheet. All are energetic and acting well. I am feeding them medicated chick starter. There is clear fluid that is expelled when they sneeze. Is this dangerous? What should be done? Thanks so much!