Nystan is available -thats your nystatin ??? answered also Medistatin.As for Herpes there are 2 diffrent typesof herpes virus that can cause disease in pigeons,1 causes paralysis and the other causes body Hepititus and is very common.This virus effects the the bowels ,throat, and resirtory organs,birds between the age of 4 - 16 weeks old are the more likly to get it.Hope this helps mate.