I have an outbreak at the moment too. I have split the group to see which product works best, first group are getting a salve containing Sulphur, Castor Oil and Neem that I use for leg mites which is working well and seems to offer a huge relief to the birds, the second group are getting an equine healing salve containing beeswax, tree resin and Manuka oil. I will see which works best. Both are easy to paint on with a makeup brush when they are at room temperature, the chooks go off into bliss mode, I guess it's like a facial
I have one stray bird who roosts in a tree and by the time I got close to him his face was a real mess so I am putting Pasternoint for horse mud fever on the bad scabs and half have fallen off already, mud fever is a virus so I figured it could work for the pox virus. None of these products seem to run into and hurt the eyes although I am very careful not to get it in them which is easy with the makeup brush. I find the salves work better than the betadine as they keep the scaps moist and supple, maybe both could be used.