why do dogs need their anal glands expressed
Dogs usually do not need their anal glands expressed by humans; most empty them naturally when they poop. Problems arise when the glands don’t empty well, leading to pressure, pain, and sometimes infection, and that’s when expression becomes important.
What anal glands do
- Dogs have two small scent sacs just inside the anus that release a strong‑smelling fluid with each normal bowel movement.
- This fluid is used for scent “ID” and territory marking, which is why dogs are so interested in sniffing each other’s rear ends and poop.
Why some dogs need help
- If the stool is too soft, too small, or a dog has structural or health issues, the sacs may not empty fully and the fluid can thicken and build up.
- Built‑up fluid can cause swelling, inflammation, and pain; if it sits long enough, bacteria can overgrow and create infection or even an abscess.
When this happens, manually expressing the glands (usually at the vet) relieves pressure and helps prevent more serious anal sac disease.
Signs your dog might need expression
- Frequent scooting (dragging the butt on the floor) or suddenly doing it much more than usual.
- Licking or chewing at the anus, difficulty sitting, or a sudden strong “fishy” or foul smell from the rear.
- Visible redness, swelling, or a lump near the anus, or straining to poop.
Any of these signs is a reason to call a vet promptly, because an abscess can form and sometimes burst.
Why expression shouldn’t be “routine” for every dog
- Most dogs express their anal glands on their own and never need manual help, so routinely squeezing them when they aren’t full can irritate the ducts and make future problems more likely.
- Many vets and professional groomers now recommend doing anal gland expression only when there are clear signs of trouble, or when a dog has a documented history of chronic issues.
Internal expression (a gloved finger inside the rectum) should be done by a veterinarian or trained medical professional because poor technique can injure the area.
Preventing anal gland issues
- Keep stools firm and well‑formed with an appropriate diet and, if advised by a vet, added fiber to give enough “pressure” to naturally squeeze the glands.
- Maintain a healthy weight and address gut issues (like chronic diarrhea, food sensitivities, or parasites) that can keep stools too soft.
- Have your vet recheck dogs that have repeated problems; occasionally there are deeper causes like anatomical quirks, chronic inflammation, or rarely tumors.
Bottom line: dogs need their anal glands expressed only when they are not doing it well on their own and start to show signs of discomfort, smell, or swelling—not as a routine “every bath” procedure.
Information gathered from public forums or data available on the internet and portrayed here.