I have a flock of about 20 birds - only one has this - I only noticed it today. Bird appears to be normal - it's began to get cold out about -15 C some days.

At night they have a dry coop - I run a heat lamp in anything below 20 C - havnt had to yet.

Is this something I should be concerned about?

Both eyes are the same - the beak has no fluid coming off it.