Thanks to all that responded. Sadie has a vet appt on Firday so I'll ask him to check the eye ducts. Hopefully it'll be as simple as finding a solution that works for her (Eye Envy) or switching her dog food.
Thanks again for you input. I really appreciate it. I'm a new memeber and its my first post on YT....and it feels so nice to know I can ask other Yorkie owners for their advice.