There are MANY good experts here, and I am not one of them, but when Bogey was about7 months old, his eye did that. I thought he was getting a cherry eye, took him to vet- turned out to be an infection. A couple of days on antibiotic drops and it cleared. He had a recurrence a year later and never again. Hope that's all it is! One of the great guru's here will be a big help!!