Why Do Dogs Mouths Quiver After Licking Pee

Why Do Dogs’ Mouths Quiver After Licking Pee?

If you’ve ever witnessed your dog licking another dog’s pee or even his own, you might have noticed that their mouths often quiver afterward. This behavior can be quite puzzling, and dog owners often wonder why it happens. In this article, we will explore the reasons behind this peculiar quivering.

The quivering of a dog’s mouth after licking pee is a natural response that occurs due to a combination of sensory and emotional factors. Let’s delve into some of the possible explanations:

1. Sensory stimulation: A dog’s sense of taste and smell is far more advanced than ours. When they lick urine, they are exposed to a whole array of scents and flavors that might trigger a sensory overload.

2. Pheromones: Urine contains pheromones, which are chemicals that convey messages between animals of the same species. These pheromones can stimulate a dog’s senses and cause their mouth to quiver.

3. Emotional response: Dogs are highly social animals and rely on their sense of smell to gather information about their surroundings. By licking urine, they are gathering important information about the other dog’s health, reproductive status, and emotional state. The quivering mouth might be a reaction to the intensity of the information they are receiving.

4. Taste aversion: Licking urine might not be the most pleasant experience for dogs, especially if they are not used to it. The quivering could be a result of the taste aversion they experience after licking something they find unappetizing.

5. Disgust reflex: Dogs have a strong instinctual aversion to unpleasant scents and tastes. The quivering could be a reflexive response to the disgust they feel after coming into contact with the strong odor of urine.

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6. Nervous system response: The act of licking itself can stimulate a dog’s nervous system. When combined with the sensory overload caused by the scent of urine, it can result in a quivering mouth.

7. Behavioral reinforcement: Dogs are creatures of habit, and if they have been rewarded in the past for licking urine (e.g., by receiving attention or treats), they might continue to engage in this behavior. The quivering mouth could be a sign of anticipation or excitement in response to a perceived reward.

8. Genetic predisposition: Some dogs may have a genetic predisposition that causes them to quiver after licking urine. Certain breeds or individual dogs may be more prone to this behavior due to their genetic makeup.

9. Psychological factors: Dogs have complex emotions and can experience a range of feelings, including anxiety, excitement, or curiosity. The quivering mouth might be a physical manifestation of these emotional states.

10. Learned behavior: Dogs learn by observing and imitating other dogs. If they see another dog quivering their mouth after licking urine, they might imitate the behavior without fully understanding its purpose.

11. Habitual response: Dogs are creatures of habit and can develop repetitive behaviors. If a dog has engaged in the behavior of licking urine multiple times, the quivering mouth might become a habitual response.

12. Individual variation: Just like humans, dogs are individuals with unique personalities and preferences. Some dogs may quiver after licking urine, while others may not exhibit this behavior at all.


1. Is it normal for my dog to quiver after licking urine?
Yes, it is a common behavior observed in many dogs.

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2. Should I be concerned if my dog quivers after licking urine?
In most cases, it is a harmless behavior. However, if you notice any other unusual symptoms or changes in behavior, it is advisable to consult your veterinarian.

3. How can I prevent my dog from licking urine?
Training your dog to avoid licking urine can be achieved through positive reinforcement and redirecting their attention to other activities.

4. Can licking urine be harmful to my dog’s health?
In general, licking urine is not harmful. However, it is essential to ensure that the urine your dog is exposed to is not contaminated with any harmful substances.

5. Why do some dogs seem to enjoy licking urine?
Dogs have different preferences, and some might find the taste or scent of urine appealing.

6. Should I discourage my dog from licking urine?
It depends on your personal preference and the specific circumstances. If it becomes a problematic behavior or poses a health risk, discouraging it might be necessary.

7. Can licking urine indicate a medical issue?
In some cases, excessive licking of urine can be a sign of a urinary tract infection or other underlying medical conditions. Consult your veterinarian if you suspect any health issues.

8. Can the quivering mouth after licking urine be a sign of discomfort?
It is unlikely to be a sign of discomfort if your dog is otherwise healthy and exhibits no other signs of distress.

9. Can puppies exhibit the same behavior?
Yes, puppies can also quiver after licking urine, as they are still exploring and learning about their environment.

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10. Is it necessary to clean my dog’s mouth after they lick urine?
Cleaning your dog’s mouth after they lick urine is not necessary unless you suspect it to be contaminated with harmful substances.

11. Can this behavior be unlearned?
With proper training and redirection, it is possible to discourage your dog from licking urine if desired.

12. Are there any health benefits to a dog licking urine?
While there is no direct health benefit, the act of licking urine allows dogs to gather important information about other dogs’ health and reproductive status.

In conclusion, the quivering of a dog’s mouth after licking urine can be attributed to sensory stimulation, emotional responses, taste aversion, genetic factors, and learned behavior. It is a natural behavior for many dogs and is generally harmless. However, if you have any concerns about your dog’s behavior or health, it is always best to consult with your veterinarian.