I've noticed over the past couple days that Dax's right eye is watering a lot more than usual. There's no color to it so I'm pretty sure it's not infected, I'll just notice that the fur under his eye is really wet. I was thinking it could be allergies but would allergies just start all of a sudden like that? And in only one eye? I saw him paw at it one or two times but it doesn't really seem to be bothering him, and it doesn't water constantly, just every now and then I'll look at him and his eye will be wet. Any thoughts?