Why Is My Female Dog Mounting Other Dogs? Causes and Triage

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TL;DR: Mounting in female dogs is a common, usually non-sexual behavior triggered by excitement or stress and is rarely an emergency. Seek veterinary care if the behavior is accompanied by physical symptoms like excessive licking, scooting, or changes in urination.

Why is my female dog mounting or humping other dogs?

  • It is a common canine behavior that is frequently a non-sexual displacement behavior rather than mating-related.
  • It often occurs as a result of high arousal, over-excitement, or stress.
  • It can happen during intense play or as a way to assert social standing.
  • It may also be a learned habit that provides a form of self-soothing for the dog.

Is it an emergency if my female dog exhibits mounting behavior?

The urgency level for mounting behavior is Low. While usually a behavioral issue, you should monitor your dog and schedule a routine appointment if you notice:

  • Excessive licking of the genital area
  • Scooting along the ground
  • Changes in urination frequency
  • Potential signs of a urinary tract infection, allergies, or inflammation

How can a photo or video help my veterinarian triage the behavior?

Capturing visual evidence can be extremely helpful for a veterinarian or behavioral consultant to identify the following:

  • The specific context and body language to determine if the cause is play, anxiety, or assertion.
  • Physical abnormalities such as redness, swelling, or discharge in the genital area.
  • Whether the issue is likely a medical concern or a behavioral habit.

Clinical Context (Merck Veterinary Manual)

Mounting behavior in female dogs can stem from various causes. Granulosa cell tumors may produce testosterone, leading to male-like behaviors such as aggression and mounting. Maternal aggression can also manifest in intact females with a litter or those experiencing pseudocyesis, directed towards people or other animals when protecting their puppies or toys. In some cases, age, illness, or inadvertent owner encouragement may play a role. It is important to address any underlying medical issues, as treating the medical problem may resolve the behavior.

Chapter: Behavioral

Source: The Merck Veterinary Manual, 11th Edition (Page 1564)

Protocol reviewed by Dr. David Smith, BVSc

Frequently Asked Questions

Is it normal for a spayed female dog to hump?
Yes, spayed females can still engage in mounting. Since the behavior is often triggered by excitement or stress rather than hormones, spaying does not always eliminate the habit.
Could my dog be in heat?
If your dog is not spayed, mounting can sometimes increase during her heat cycle due to hormonal fluctuations. Look for other signs like a swollen vulva or bloody discharge.
How do I stop my dog from mounting others?
The best approach is redirection. When you see the signs of over-excitement, distract your dog with a favorite toy or a 'sit' command before the mounting begins.

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