Naa. Birds would appear extremely ill. OP says they're eating well and don't appear affected by it.
I found no indication of any bevavioral changes, in regard to symptoms for gangrenous dermatitis, but reviewing the three following links makes me doubt this one as well ... there's been no mortality reported, and there's been enough time pass that there'd be red or dark coloring in the affected areas, and they'd be more prone to appear in different areas.
http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/204900.htm
http://www.ihc-poultry.com/page/Gangrenous_dermatitis/33
http://www.upc-online.org/poultry_diseases/62504gangrenous.htm
I still suspect this to be bacterial, based just upon the way ...
typed by a recovering bird, that can't resist the clicking of the keys: iji7hj
... it looks, but it still could be a fairly long list viral causes, including Merek's.
Without more information, including updates as to any change, or additional symptoms? I'm still just guessin' here ...