Why Do Dogs Drag Their Butts?

Is it anal glands?

Most of the time, yes. Dogs have two small glands just inside the anus that produce a pungent fluid normally expressed during bowel movements. When these glands become full, impacted, or infected, they cause pressure and discomfort that your dog tries to relieve by dragging their rear across the floor. According to the Merck Veterinary Manual, anal gland impaction is one of the most common reasons dogs present for scooting. Your vet or groomer can manually express the glands, and if impaction is recurring, your vet can investigate the underlying cause.

Could it be parasites?

Tapeworms are a classic cause of scooting. Tapeworm segments (which look like small grains of rice) can be visible around the anus or in the stool, and they cause itching as they pass. If you see rice-like segments near your dog's rear end, that's likely the culprit. A fecal exam at your vet confirms the diagnosis, and deworming medication clears it up. Other intestinal parasites can also cause rectal irritation, though tapeworms are the most directly associated with scooting.

What else could cause scooting?

Allergies (food or environmental) can cause itching around the rear. Matted fur or debris stuck near the anus can create irritation. Rectal prolapse, wounds, or skin infections in the area are less common but possible. If your dog is scooting and you can't see an obvious external cause, and the anal glands and parasites have been ruled out, your vet can look for less obvious sources of irritation.