Why do dog scoot ? Toy Poodle and Maltese - senior dogs

First time grooming by King. 

Part of Full Grooming is to express anal gland. Both dogs has plently of anal gland juice which indicates that it was not done for years. 

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However, bacteria can build up in the anal glands if they don't express properly, and this can lead to an infection.

Small dog breeds will often start "scooting" their bottoms on the ground or carpet after or before defecation, a sign that they might need their anal glands expressed. Small glands near the dog's anus secrete a fluid that assists defecation. These glands often become backed up and need to be expressed to keep the dog comfortable and healthy. While the veterinarian will do this for you, it's also possible to save yourself a trip to the vet's office and have your groomer do it .You'll save a lot of money and time!