Cure for chickens with stuffy, runny, noses?

[naomijm]

My girls are starting to have the occasional drip as well. It’s getting cold here now. I had this happen for the past couple of years in the fall. I think it’s just a change in the weather. I usually put something menthol based for chickens under their wings and they are fine.

 

[Saaniya]

My two Serama hens have stuffy, runny noses.
What could I give them to cure it? It hasn't effected there eating, drinking, or activities, there acting like healthy chickens.
But they are constantly sneezeing, and have stuffy, runny noses. I've been dabbing a bit of peppermint extract on there wings which helps open there air ways and help them breath better, but I'd like to find somthing that will cure it all together.
There not acting like there in danger of dieing, but I don't think its to plesant for them.

Any help would be appericated, if you have links to an online store with medication to help cure this would be amazeing.
Thanks, Ivy.

Plenty of things like
Garlic
Oregano
Dil
Black pepper 0.1% ratio
Apple cider vinegar
Capcicum is known to treat some CRD