Hi everyone It's the first time posting for me, but I have followed this blog for a while due to the fantastic advice! My Silkie roo cross has this weird black gunk encrusted on his comb. He shares a coop with his sister (they hatched together 4 months ago) and during the day he free ranges. It's not a pecking related injury, so I am worried it could be fowlpox. I live in the south of spain so it never gets really cold here and it barely rains that often. Do I need to take him to a vet? And what could this be? Pic attached. Thanks so much in advance!