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 carnivorans , including wolves ,  bears ,   sea otters  and kinkajous.
Anal sacs: a new approach to an old problem? | Veterinary Practice
How often should anal sacs be emptied and what are some of the misconceptions about the best antibiotics to use for infection? What are anal sacs and why do they fill up? Anal sacs, sometimes mistakenly referred to as anal glands, are two small structures located between the internal and external sphincter muscles. Each sac is lined with both sebaceous and apocrine glands whose combined secretions produce a semi-oil foul smelling brown liquid. As the anal sphincter muscles expand, as defaecation occurs, pressure on the sacs leads to the expulsion of their contents over the faeces. Problems arise when this emptying process does not occur and the secretions build up in the sac, causing obvious discomfort to the dog. Suggested reasons include change in the character of the secretion, excessive secretions, soft faeces or diarrhoea, poor muscle tone and obesity.
You See Bleeding or an Abscess on Your Dog’s Bottom… What Does It Mean?
February 11th, by Cherished Companions Animal Clinic. At this point, you may see signs of an anal gland infection or a rupture , such as:. This allows our veterinarians to flush and unplug the glands, clean out the pus and infected areas, and treat the trouble spots with antibacterial solution. If your dog has an abscess or is bleeding on his bottom and you live near Castle Rock, Colorado, call our veterinarians at or:.
This post may contain affiliate links. Read more here. Unfortunately lots of dogs have problems with their anal glands. Some anal gland impactions get so bad that they become abscessed and rupture, causing pain for the dog, and quite a nasty mess for their people as well as the costs associated with having the infection and abscess treated.