I have 2 black copper marans 1 speckled sussed and 1 gold buff and black orphington that have always been together in their own coop/run. My copper maran hen started "sneezing" a few days ago. Having dealt with chicken disease in the past i immediately panicked however she is eating, drinking, and acting normal otherwise. No discharge, no wheezing, no bubbly eyes. Just sneezes. If it makes a difference it did start when our heat index soared to 106°F and it has remained that for about 5 days. They are in the shade and i pit out a wading pool and electrolytes in ice water. Should i be worried? They all seem very stressed from the heat! None of the others are showing symptoms. Could it be heat, pine shavings, dust from feed? Its day 4 and nobody else is doing it so i assume shes not contagious. Can i check somehow to see if shes got something up her nose?