my Havoc has an eye that waters a lot from time to time. The vet said the eye itself looked OK and couldn't offer any help with it. However a lot of people I currently work with used to work at vet clinics and one suggested that it was a clogged tear duct. Whenever his eye gets all runny, I just massage the corner of it for a day or two and it goes away.

Although your girl's eye may be a delayed reaction from the previously-discussed allergy.