My corgi Brian has always had teary eyes since I got him, which tended to be off and on (especially depending on present allergens). However, his tearing started to get more consistent (every day) about a month ago when the weather really started to get cold. He now has constant tear stains, and his eyes "run" a clear tear subtance every once and a while, which I prompty wipe up with a cloth or tissue.
However, in the past week, he's started to wake up with light greenish goop in the corners of his eyes (although much more often just in his right eye). This is only after sleeping for an entire night; I haven't noticed any other eye secretions (other than the clear tearing) during his waking hours. I've checked his eyes, and they don't seem red at all, and he isn't bothered by the tearing or the goop at all. I've been thinking that it might be an infection from reading some of the other discussions, but I'd rather get some input before I take him for a costly vet visit.