Thanks for all the input, I really appreciate it! I don't think it's her diet, although KateG's comments about the dog food certainly give me pause. The mention of inhalant allergies makes me wonder, though; we live in Massachusetts, and have been enduring an extremely bad year for seasonal allergies like pollen and--with all the rain we've been having--molds. I developed a sinus infection & wound up on prescription antihistamines for a while, and we've noticed that Lucy (our dog) has had runny eyes on a pretty regular basis. It doesn't seem to be bothering her, but they just get sort of teary, which is just how *mine* have been, so I wonder about the possibilities in terms of us having adverse reactions to the same allergens?

~D