You know your dog marks his or her — girls do it too! Each sac contains oil and sweat glands. Just like us, dogs need fiber in their diet. Fiber helps the anal glands work properly. So, a lot of dogs need their anal glands expressed manually. That means the vet or groomer squeezes them by hand to get the fluid out.
Anal gland - Wikipedia
You could be facing an issue with anal gland leaking. No one likes this dog problem — veterinarians or pet owners. If you never had this problem with your pet before, you are in luck. However, it pays to know the details just in case you face this issue in the future. The gland is present in small mammals including dogs and cats. Anal glands produce a liquid with an odor unique to the stool produced by the animal.
Dog Anal Glands: DIY Solutions That Work
Dogs can smell like many things, depending on what they have most recently rolled in, but one of the more unpleasant aromas dogs commonly develop is one of fish. If your dog smells like fish, it is probably not because he figured out how to spray himself with Eau de Sardine. A fishy odor is usually the result of secretions from the anal glands.
This is a forum on dog training and behavior that focuses on a least intrusive, minimally aversive approach. The advice here is not a replacement for professional help. If your training is not fun and effective, or if you need additional help, then please find a certified trainer for assistance.