Quote: The canker treatment may have been too late for your Hamburg if in fact it was canker to begin with. There's a foul odor with canker infected birds. Wet pox (like dry pox) is a virus and not treatable with antibiotics. Birds starve to death due to lesions blocking the esophagus, birds cant swallow food nor drink. The lesions can get into the respiratory tract as well. Wet pox lesions in the mouth can be removed but there will be blood. Swabbing the mouth with iodine after removing lesions may give infected birds a chance to swallow feed to prevent starvation.
Fowl pox is mainly spread by mosquitos as you probably already know. Try to eliminate sources of standing water on your property and change out waterers frequently