Hmm, i change it out pretty frequently but I guess it's possible! Is it likely that it would affect them all at the same time like that? I'm going to do some reconstructing of their space immediately.
I took out a plate of scrambled eggs and rice for them and verified they every single chicken ate some of it. There was a lot of random sneezing and coughing but it didn't seem to interfere with their eating.
The ventilation in their nighttime coop is probably not the best, it has hardware...
I'm new to chicken keeping, I've had my birds for about 10 months. I have one black Australorp rooster and 9 barnyard mix hens. Everyone has been in perfect health all their lives.
Last night one hen sneezed a couple times but everyone was eating, pooping, laying eggs, so I was thinking maybe...