My young chickens have come down with a disease.. I think its coryza.. because 2 have very smelly faces....and the base of the beak is swollen.. so they can't fully close their beaks..... but it also looks like they have fowl pox... can they have the 2 diseases together, or is this something else? In the past my chickens have got fowl pox.. but it was nothing so nasty looking as this!!! I have started treating with Sulfmet 12.5% in the drinking water. They share the coop with some king pigeons.. is this Sulfmet stuff safe for them too drink too? On the below photo.. see how swollen the base of the beak is.. and its breath smells bad. This one has its eye swollen shut.. should I bath it? And this last one looks like its just got the fowl pox?