All you need to know about your dog’s anal glands but were too afraid to ask

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Published: Monday, 01 July 2024 at 12:24 PM


Blocked anal glands can be a painful problem for your dog, says PDSA Vet Nurse Nina Downing – but a trip to the vets should sort them out.

What are anal glands?

The anal glands are a pair of small sacs that sit just inside the anus (bottom). They contain a strong-smelling liquid used for marking territory. 

Why do dogs need anal glands expressed?

Healthy anal glands empty naturally when a dog poos, but if this doesn’t happen, they can over-fill and become blocked. Blocked anal glands are irritating and painful for your dog, but usually quick and simple to treat.  

What are blocked anal glands?

Blocked anal glands are a relatively common problem, however, left untreated, they can lead to more serious problems such as infections or abscesses. It’s always best to contact your vet if you think your dog has blocked anal glands. 

We wouldn’t recommend owners try to treat an anal gland problem themselves unless following guidance from their vet, as you could cause serious damage and pain. 

Any dog can develop blocked anal glands but it’s more common in overweight dogs due to weaker muscles around the bottom, dogs born with narrow anal gland openings (which make emptying difficult), and dogs that have ongoing diarrhoea or soft stools, as anal glands rely on firm, bulky stools to push past and empty them. 

What are the symptoms of blocked anal glands in dogs?

There are a number of signs your dog may display if he has blocked anal glands:

How anal glands are expressed