This bird most likely also has Marek's but seems to be asymptomatic and is seemingly healthy and symptom free otherwise.
Any opinions would be greatly appreciated.
i had it run through all my birds, from my experience one you get the black spots the disease is over. the pox is actually large bumps/blisters that when the disease is beaten, drain and fill with blood/scab and eventually fall off. the scab is what is black. it did nothing more than make everyone molt to my chickens but it killed 2 turkeys and nearly killed a third. that leaves me with 6 turkeys that my mom has now become so attached to she wont let me kill them for thanksgiving facepalm.
the advice i found is keep their diet the same, slip them some vitamins if you like. and wait.
keep a close eye on who is eating because if any develops in the mouth or throat (wet pox) they will stop eating and may die. it can remain contagious for 3 months after the scabs fall off. all birds effected by it are now immune to it. if it reoccurs you may want to start spraying for mosquitoes or start vaccinating new arrivals.
yeah when turkeys started dying i started digging lol.
the bumps didnt get that big on any of my other birds. unless you are out there checking them for this or lice or something the first sign of it is the black scabs.
the increasing black scabs does sound kind of worrying, mine all went through the turning stage in maybe 2 days. see that bump on his ... is waddle the word? the bit hanging from his chin. gently feel that and see if it feels like a pimple with the surrounding skin irritated and swollen, or if there is a less developed bump try that because after 2 days that on is probably entirely scab by now. if so its likely pox that is turning black. also keep in mind that some of it may be battle wounds from ladies pecking at that speck on him. i can say its not mareks. that doesn't mean its not something else entirely.