My baby-boy had the surgery done at just 4 months old, only one eye, though. The vet said that the gland was big, and it could come out again, but so far so good. It was little over a month ago. Our vet thought that it's better to do the surgery than waite. The clands can get infected and they can also damage the surface of the eye in the long run. It's minor operation and the sedation is short. Needles to say I was worried sick, but he did great and was back to himself in no time.