Eric has had bilateral Entropian surgery about a year ago. He has chronic dry eye with gunk having to be cleaned out every hour. He scratches and itches constantly and is extremely lethargic for a 3 year old dog. He has nice soft coat but alot of dandruff. He is always biting at his anal glands. I understand it isn't good for the vet to express anal glands manually as it makes them loose their tone? Is there anything to make anal glands express naturally?