The past 2 or 3 days I've noticed Eddy has pretty bloodshot eyes during most of his waking hours. Like he looks REALLY tired. There are what appears to be 2 tiny burst vessels right outside the iris, in the whites. I have to gently pull back his lid to see them. And then most of the whites just look pinkish, bloodshot. He plays hard, sleeps a lot, and doesn't tug very much on his leash. His collar is loose, I can fit two fingers easily around it. Also, they don't bother him, they're not dry eyes, there's no crusties or pus or anything obviously weird. What else could be causing this?