
09/10/2025
WEDNESDAY WISDOM:
Flank Sucking In Dogs
A few weeks ago John and I went out to a local campground to see my sister and her husband for dinner. They had Rin, their younger German Shepherd with them camping. But as most campgrounds are in August, there were lots of other campers and dogs at the campground. This included some campers right next to them with a smaller dog that looked to be a miniature Australian Shepherd but was clearly very dog aggressive. Needless to say, it was a bit stressful for my sister's dog. I kept watching that dog who was endlessly trying to start things with Rin. To their credit, the owners of the dog did try to stop his bad behavior most of the time. But it was certainly an ongoing situation.
The barking and lunging of the neighboring dog certainly put some stress on Rin, making him seem anxious. He is a dog friendly guy so he really just wanted to be able to meet the other dog. Anyway, eventually he settled down with us sitting around him and we noticed that he began to suck on his flank. And this is when John and I learned about flank sucking, as my sister explained to us that her vet had diagnosed him with this.
Flank sucking is a type of canine compulsive disorder (CCD) that is most often seen in Doberman Pinschers. It is characterized by a dog holding in its mouth, or sucking, a piece of its own flank skin. It is a repetitive act that is related to other nonnutritive sucking behaviors, such as blanket sucking. While seemingly harmless, it can lead to skin, hair, and behavioral issues if not managed properly.
It turns out that flank sucking is believed to be brought on my stress, anxiety or boredom in dogs. Typically it starts as a coping strategy, as the action releases relaxing endorphins. Sometimes it can become obsessive and chronic, creating a cycle of behavior, as anxiety relief is brought from the activity, and then the anxiety returns which leads again to the activity. Dogs with high anxiety might need only minor triggers once the behavior has become habitual. Flank sucking can usually be successfully managed by consistent therapy.
Treatment for this disorder is the same as for other CCDs, and can involve both medication and behavioral techniques. Often, this condition requires lifelong management, but control of symptoms is possible. A balanced diet can be important in helping to modify the behavior. Also, medications can be prescribed to help control the symptoms.
In addition, behavior and environmental modifications can help by removing stress that causes the behavior. You would want to understand what your dog's stress triggers are, what might frustrate your dog and the kind of structure that is present in day to day activities and whether there are factors that reinforce this behavior.
Some ways to help minimize this may include:
-Consistently maintaining a daily routine for your dog that includes feeding, playing, walking and sleeping
-Provide social interactions on a regular basis
-Create a restful area for times between social interactions that contains mentally-stimulating items to maintain interest, such as stimulating toys, chew toys, and objects with hidden foods
-Remove or avoid your dog’s stress triggers or frustrating activities
-Do not punish behavior, as it can lead to further anxiety
-Give rewards when desirable behaviors are exhibited
-Ensure your dog gets plenty of exercise, at least 60 to 90 minutes per day for large dogs
-Play calming audio or video recordings while your dog is left alone if he suffers from separation anxiety
You basically will need to always anticipate and reduce your dog’s triggers, and learn how to recognize the behavior and redirect when necessary. Successful management usually needs lifelong attention. Do any of you own a flank sucking dog?
If so, you may want to consider some basic obedience training. John and I took the month of August off from offering group lessons due to being busy with boarding dogs at the kennel and felt we just needed a break. But we are back to training and tonight will be week two of our September Basic Obedience Training.
If you have any training or boarding needs be sure to give us a call at 231-845-0550 to discuss what options might be a good fit for you and your dog.