Hi everyone, I recently bought 3 new pullets and when I brought them home I noticed they had (clear) runny noses. The next day I noticed them sneezing and discharge coming out of their nose. A couple of them were making bubbles on their nose. I started them on antibiotics thinking the worse since I have 5 healthy chickens. I've had them all separated. This is day 4 and I've seen slightly less sneezing, no more bubbles, but still some clear runny noses. Other than that, they've been eating well, cleaning themselves and no other symtoms. Could this be allergies? Should I keep them separated from the rest always?