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In this time of crisis, our front-line staff are working hard to ensure we're still there for the UK's most vulnerable pets. We need your support now more than ever to keep our doors open. The anal glands are a pair of small sacs that sit just inside the anus. They contain a strong-smelling liquid used for marking territory. Healthy anal glands empty when a dog poos.
This is the reason dogs smell others' bottoms when they meet. A vet or vet nurse will squeeze the anal glands to release the liquid. This must be done by a qualified person, you can cause damage and pain to your dog if you try to do it yourself. Your dog may require regular treatment if it continues to reoccur.
The anal glands or anal sacs are small glands near the anus in many mammals , including dogs  and cats. They are paired sacs on either side of the anus between the external and internal sphincter muscles. Sebaceous glands within the lining secrete a liquid that is used for identification of members within a species. These sacs are found in many species of carnivorans ,  including wolves ,  bears ,   sea otters  and kinkajous. The anal glands are in the wall of the anal canal.