Service
Basket
Menu
This week up to 33% off dental care for your pet Read more

Anal glands in dogs: function, problems and what you can do

Written by Mara |

Many dog owners will encounter it at some point: problems with the anal glands. Although anal glands play only a small role in a dog’s body, disruptions can cause significant discomfort. In this blog, you will learn where the anal glands are located, what their function is, which problems can arise and, most importantly, how you can help prevent issues.

Dog lying on the sofa looking into the camera

Where are the anal glands located in dogs and what is their function?

Dogs have two anal glands, also known as anal sacs. These are located on the left and right of the anus, roughly at the four and eight o’clock positions if you imagine the anus as a clock.

The anal glands produce a strongly scented fluid. This scent plays a role in:

  • communication between dogs
  • recognition
  • territory marking

Under normal circumstances, the anal glands are emptied automatically during defecation, when firm stools apply pressure to the glands.

Relevant products

Why do anal gland problems occur?

Problems arise when the anal glands are not emptied properly. This can happen, for example, in cases of:

  • soft or inconsistent stools
  • chronic gastrointestinal problems
  • overweight
  • an abnormal position of the anal glands
  • dogs that do not take enough time to defecate, resulting in insufficient emptying of the glands

It is important to know that anal glands should not be expressed preventively. Doing so can stimulate the glands to produce more fluid, which may worsen the problem.

Common anal gland problems

There are several anal gland issues that are commonly seen in dogs:

1. Blocked anal glands

In the case of blockage, the anal gland becomes overly full with glandular fluid.

If your dog has blocked anal glands, you may notice the following signs:

  • scooting, dragging the rear end across the ground
  • excessive licking or biting around the anus
  • restlessness or discomfort when sitting

A blockage is usually not extremely painful, but it is uncomfortable. Without treatment, it can develop into an inflammation. A vet can manually express the anal glands to help prevent infection.

2. Anal gland inflammation

If bacteria enter a blocked anal gland, inflammation can occur.

Signs of anal gland inflammation include:

  • clear pain around the anus
  • swelling around the anal area
  • blood or pus during defecation
  • sometimes fever or lethargy

An anal gland infection should always be treated by a vet. Antibiotics and pain relief are often required.

3. Anal gland tumours

Anal gland tumours are rare but occur mainly in older dogs. They can be malignant and may produce hormone-like substances that increase calcium levels in the blood.

Possible signs of anal gland tumours include:

  • a firm, poorly movable swelling
  • weight loss
  • lethargy
  • difficulty defecating
  • symptoms associated with high calcium levels such as excessive drinking, frequent urination, loss of appetite, vomiting and weakness

If a tumour is suspected, prompt diagnostic evaluation by a vet is essential.

4. Perianal gland tumours

These tumours do not originate in the anal glands themselves but in the glands around the anus. They occur mainly in unneutered male dogs and are often hormonally influenced.

These tumours are:

  • usually benign
  • may bleed or become inflamed

Treatment often consists of surgical removal, frequently combined with neutering.

How can you help prevent anal gland problems?

You can only influence the normal emptying of the anal glands to a limited extent. Firm stools are the basis for this. Because the anal glands are emptied by pressure from the stool, good intestinal function is essential. This can be supported in several ways.

High-fibre nutrition to support the anal glands

Diet plays an important role in preventing anal gland problems. A high-fibre diet helps to make stools firmer and bulkier, allowing the anal glands to be emptied more effectively during defecation. This can reduce discomfort and lower the risk of recurring problems.

An example of a suitable diet is Royal Canin Gastrointestinal High Fibre, a food specifically developed to support intestinal function and regulate stool consistency.

If symptoms persist, it is advisable to adjust your dog’s diet in consultation with a veterinarian to ensure it meets your dog’s individual needs.

If changing the diet is not desirable, you can also increase the fibre content by adding psyllium fibre to the food. Psyllium firms up soft stools (binding in cases of diarrhoea) and increases stool volume.

Please note: psyllium should always be given with sufficient water. Without enough water, it can make the stool very hard.

Supplements to support anal gland function

There are supplements specifically developed to support anal gland health, such as:

These products combine fibres with ingredients that support gut function and anal gland health.

Herbal support

Certain herbs may contribute to healthy digestion and help reduce inflammation, including:

  • Canadian golden seal (Hydrastis canadensis)
  • Cat’s claw (Uncaria tomentosa)
  • Greater plantain (Plantago major)
  • Sage (Salvia officinalis)
  • Chamomile (Chamomilla vulgaris)

These herbs are, for example, included in Groene Os Digestivo Complex.

Probiotics for a healthy gut flora

Healthy intestines support regular bowel movements.

  • Probiotics support the immune system
  • they help stabilise stool consistency

Blocked anal glands and anal gland inflammation in dogs are unpleasant but can often be prevented with the right approach. Firm stools, a healthy gut flora and targeted support form the basis. Avoid expressing the anal glands preventively and always have complaints assessed by a vet to prevent complications.

Do you have any questions about your dog’s anal glands? Please contact us via veterinarian@vetsend.co.uk.

Sign up for our newsletter

Also read our other blogs

More tips
image (20)

About the author

Mara van Brussel-Broere, Veterinarian at Vetsend

Graduated as a companion animal veterinarian from Utrecht University, she uses her practical experience to advise customers and share knowledge at Vetsend. She finds it important to provide pet owners with clear information about health and wellbeing.

Read more about Mara