I have to admit, it certainly doesn't look like what your poor bird has. It started as a few black spots, they wern't critters - I checked, but then they starting popping up all over his comb and wattles and now his comb has tuned ashen almost looks like fungul infection but started as black spots, no oozing, always been dry. So possible bites but not sure why its turned whitish/grey now? His 2 girls are absolutely fine, I can separate them during the day but I only have 1 small wooden coop for night time unless I shut them up at night and let him roost on an outside roost - it is perfectly safe from prey - would that be ok? it's not cold here!