This is going to make me sound really rather stupid but I have only had sheep for the first time this year. Prior to that I didn't really get up close and personal with them so never noticed this before.
Each of my Zwartbles sheep has a hole/divet/depression on either side of its face, just below the eye. All eight of them have these so I'm not too concerned as I figured it's a part of their natural anatomy but what exactly are they? No amount of searching any of my books or Google can help (probably because I'm not sure what to call them!). Sometimes they seem to be a little mucky, other times a little wet. I can only liken the 'muck' to the 'sleep' that gathers in human eyes at the corners.
Can anyone shed any light for me?