Found this info at Merck on Gangrenous Dermatitis: http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/204900.htm
This can come on spontaneously in young birds, but can also result from seriously infected injuries. Merck says:
"Gangrenous skin necrosis may be associated with various aerobic and anaerobic bacteria; however, Clostridium septicum , Clostridium perfringens type A, and Staphylococcus aureus , either singly or in combination are most often involved."
You've not said what (if any) antibiotics you've been adding to the water. Merck recommends:
"Chlortetracycline, oxytetracycline, erythromycin, or penicillin in the water have proved beneficial for staphylococcal infections."
Notice that there is no mention of sulfa drugs (like Sulmet) being effective against staph.
This can come on spontaneously in young birds, but can also result from seriously infected injuries. Merck says:
"Gangrenous skin necrosis may be associated with various aerobic and anaerobic bacteria; however, Clostridium septicum , Clostridium perfringens type A, and Staphylococcus aureus , either singly or in combination are most often involved."
You've not said what (if any) antibiotics you've been adding to the water. Merck recommends:
"Chlortetracycline, oxytetracycline, erythromycin, or penicillin in the water have proved beneficial for staphylococcal infections."
Notice that there is no mention of sulfa drugs (like Sulmet) being effective against staph.