weeping eyes

[jsls]

Hi, My yellow lab has weeping from bith eyes. It is not gunky or inflamed looking, but leaves red streaks on her face. She doesnt seem bothered by this at all. Should I just leave it(been about 2 wks) She has had no change in diet or environment. We do go to a dog park everyday yhat can be quite dusty and muddy, as she rolls around alot when she is playing I wondered if it could be this thats the problem. Many thanks.