Dog Anal Glands - Symptoms, Impaction and When to See a Vet

Anal glands are one of those body parts most owners never think about - until their dog starts scooting across the living room carpet or releasing a fishy smell that has nothing to do with dinner. The good news: caught early, this is usually a simple fix. You just need to know what to look for.

What are anal glands and what do they do?

Anal glands (also called anal sacs) are two small pouches sitting roughly at the 4 o'clock and 8 o'clock positions on either side of your dog's anus. They produce an oily, intensely smelly fluid that carries your dog's unique scent signature. This is why dogs spend so long sniffing each other on walks - and why they are so interested in each other's toilet spots. The anal glands function as a kind of personal ID card in the canine world.

In a healthy dog the fluid is squeezed out naturally every time a firm stool passes. Problems start when the secretion thickens and blocks the duct, or when stools are consistently too soft to provide the pressure needed for natural emptying.

Symptoms - how to tell something is wrong

The signs are usually hard to miss:

• Scooting - your dog sits down and drags its rear end along the floor or grass. This is the most recognisable symptom.
• Excessive licking and chewing around the base of the tail or the rear end generally.
• A strong, fishy smell from the rear end, even after a bath.
• Reluctance to sit or difficulty getting comfortable.
• Straining during bowel movements, sometimes with whimpering.
• Swelling or redness near the anus - a more urgent warning sign that may point to an abscess.

Worth noting: scooting can also be caused by intestinal worms. If you are unsure, your vet can tell the two apart in a quick examination. Regular deworming is part of the same hygiene picture - worms and full glands can both cause similar behaviour.

The four stages - from full to abscess

Anal gland problems usually follow a progression:

Stage	What is happening	Typical signs
Full glands	Glands are filled but the duct is still open	Scooting, licking, fishy odour
Impaction	Secretion has thickened and blocked the duct	Strong discomfort, no natural emptying
Infection	Bacterial infection of the gland	Pain, swelling, possible fever
Abscess	Pus has built up, risk of rupture	Severe pain, red or purple skin, discharge

The earlier you act, the simpler and cheaper the solution. Impaction is resolved by manual expression at the vet. An abscess needs antibiotics and often surgical drainage and flushing. In chronic, recurrent cases the vet may discuss surgical removal of the glands (sacculectomy).

When to see a vet

Any time your dog is scooting or showing the symptoms above - this does not resolve on its own, and waiting leads to complications. Go to a vet urgently if you notice:

• swelling, redness or a bluish-purple discolouration near the anus
• discharge of pus or blood from or near the anus
• your dog yelps, growls or tries to bite when the tail area is touched
• your dog stops eating, becomes lethargic or runs a temperature

An anal gland abscess is not a situation to sleep on - it needs prompt attention to prevent the infection from spreading.

Expression - yes or no?

Anal gland expression is not something every dog needs, and it should not be done as a blanket preventive measure. Most dogs manage perfectly well on their own throughout their entire lives. Repeated manual expression without a clinical reason can actually make things worse: it irritates the gland tissue, narrows the duct over time, and creates a dependency on regular intervention.

Your vet will assess whether your dog actually needs expression and how often. If regular help is genuinely required, they can also show you a safe external technique for home use - but this is not something to attempt without prior instruction.

Prevention - what you can do

Healthy anal glands are often a question of healthy stools. A firm, compact stool compresses the glands naturally - soft or unformed stools do not.

• Feed a balanced, fibre-rich diet. Vegetables such as carrots or pumpkin help produce the right stool consistency.
• Keep your dog at a healthy weight. Excess fat tissue around the glands makes natural emptying harder.
• Regular walks and movement support healthy digestion and regular bowel habits.
• If your dog belongs to a predisposed breed (see FAQs), it is worth discussing a prevention plan with your vet early.

Anal gland care is one part of broader dog hygiene - alongside ear cleaning and dental care, it forms a routine that catches problems before they become serious.

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More walks, more movement, better digestion - and better digestion means a lower chance of blocked glands. If you are looking for new routes or want to find dog-friendly spots near you, check the DOGOUT map. Get out there with the pack.