Anal gland problems affect millions of pets and are a very common and frustrating problem. Anal gland issues arise when the anal glands of dogs and cats becoming over-filled, blocked, or irritated. All dogs and cats have these two small glands sometimes referred to as anal sacs near the anal opening. These glands which are typically the size of a small grape normally release a few drops of scent marking fluid whenever your pet defecates observed near the end of defecation. The illustration in figure 1 shows the relative size and position of the anal glands in dogs often referred to as anal sacs.
Anal gland impaction
Anal gland - Wikipedia
Many pet owners are stumped the first time they notice the pungent, fishy odor coming from their pet. While dogs have the most problems with their anal glands, even cats can have issues. The anal glands, or anal sacs, are two small glands ranging from about the size of a pea to the size of a grape. Their openings are located just inside the anus and are positioned at about and They create a smelly secretion that can range from being a thin liquid to a thick paste.
Dog Anal Gland Info
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.
No need for a trip to the vet. We show you how to express your dog's anal glands at home. I was taught this method by a vet, so it is a veterinary approved method to empty your dog's anal glands. It is what is known as the external method, as opposed to the internal method of anal gland emptying, which can be slightly trickier and more invasive.