I was told that anal glands should be expressed about every 30 days. Usually this is done when the dog gets groomed. Dont bet on it though, because my mother dog's groomer sometimes "forgets" to do this. It is a messy job, and should be done right before their bath. If the dog is scooting on the floor, the glands need done. I take my baby to my school, where the animal management teacher takes care of her, so I know they are taken care of. As messy as it may sound, I would do it if I had to as it's needed for good health. The book "Puppy's for dummies" has a section that discusses this issue. Good Luck!