hi, I've read a lot about sneezing chickens with snot. Mine are sneezing but don't have snot, yet. they are acting normal, and eating, laying, etc. the rooster is sneezing too, and just moans, no crowing. but he is acting normal too. the only thing i've done so far is AC vinegar in their water.. I should also mention one of my ducks just died, her symptoms were labored breathing, after 3 days she was dead..... PLEASE HELP!!