In this article

1. Start with the situation, rather than a rank
2. What an older castration study actually found
3. A newer survey adds useful caution
4. Discuss neutering as an individual decision
5. Check discomfort and changes in toileting
6. Respond calmly and make the next occasion easier

A cushion, a visitor's leg, a dog in the middle of a game: mounting can arrive in a scene where nobody expected it. It is often more embarrassing for the people watching than for the dog doing it. Embarrassment, though, is not an explanation.

PDSA describes humping as behaviour seen in both male and female dogs, with possible triggers including sexual motivation, play, excitement and stress. It can also accompany medical problems¹. The same visible action does not settle which explanation applies.

Start with the situation, rather than a rank

UC Davis's clinical behaviour handout describes mounting people in connection with stress, anxiety or attention-seeking, and mounting other animals in connection with arousal, anxiety or play. It calls dominance a rare explanation and notes that mounting may continue after neutering².

That does not turn a glance at one episode into a diagnosis. “Excited” and “anxious” are possible explanations to investigate, rather than labels that make every instance harmless or tell you exactly how to respond.

The veterinary behaviour society AVSAB explains dominance as a relationship involving consistent priority access and deference between individuals. It advises against using dominance theory as a general explanation for behaviour problems or a guide to confronting pets³.

Its recommended approach focuses on learning, reinforcing desirable behaviour and assessing underlying emotional, medical and other factors. A single act of mounting does not establish a whole social relationship, and it does not give an owner a reason to use force³.

For a useful description, name who or what was mounted and what happened around it. “It happened after visitors arrived” preserves a circumstance. “He wanted to be in charge” supplies a motive you have not established.

What an older castration study actually found

A cohort study used telephone reports from owners of 57 male dogs, all older than two at castration and showing at least one targeted problem behaviour. For mounting, urine marking and roaming, it reported at least a 50% improvement in at least 60% of the affected dogs⁴.

Those thresholds describe a reduction, rather than a guarantee that the behaviour stopped. The study relied on retrospective owner estimates. Its abstract does not establish how a puppy, a female dog or a dog mounting for a different reason would respond⁴.

It is useful evidence that some owners reported meaningful change, with clear limits. It cannot tell you whether a particular episode is driven by sex hormones, or supply an individual forecast from the headline percentage⁴.

Keep two questions separate when reading this number: what did the researchers measure, and how closely does that group resemble your dog? Both matter when putting a percentage to use⁴.

A newer survey adds useful caution

A Dutch online survey analysed 982 owner reports. Mounting was reported for 25% of intact males and 18% of castrated males, a statistically significant difference. The intact male–female comparison did not reach statistical significance, and neither did the comparison between intact and spayed females⁵.

The study compared different dogs at one point in time. It did not observe a randomised group before and after surgery. Recruitment was by convenience, most respondents were women, and owners reported the behaviour⁵.

The authors explicitly said that their design could not establish causal effects of desexing. Mounting still occurred among neutered dogs. These findings therefore do not turn the two percentages into a promised reduction after an operation, or prove that hormones explain every case⁵.

“Can it help?” and “Will it solve this?” are different questions. Research can inform a discussion of the individual and the reasons for considering surgery, rather than replace it⁵.

Discuss neutering as an individual decision

The BVA and BSAVA's current policy describes the behavioural effects of neutering as complex and sometimes unpredictable. It recognises possible reductions in male sexual behaviour, including mounting, while recommending assessment when behaviour is an important reason for considering the procedure⁶.

Its wider decision includes breed, age, health, behaviour and the animal's and owner's circumstances. For male dogs, it recommends a case-by-case discussion. Its recommendations also address physical maturity and a careful conversation before deciding to proceed⁶.

That gives an owner something concrete to ask: which part of this dog's behaviour might be hormone-related, what other explanations need assessment, and what benefits and risks matter for this dog? Humping alone is not enough information to make the decision⁶.

You do not need to arrive with the answer. Bring the pattern you have noticed and the question you want help with. An appointment can be useful even when its outcome is further assessment rather than an immediate decision about surgery.

Check discomfort and changes in toileting

UC Davis lists itchy skin, urinary infection and incontinence among medical issues to consider. It recommends seeing the regular vet first, and notes that physical attempts to stop mounting can result in bites².

PDSA advises contacting your vet about excessive mounting or aggression when you try to stop it. Assessment can check health problems and guide referral to an accredited behaviourist¹.

Urinary changes deserve their own attention. PDSA lists blood in the urine, frequent or painful peeing, leaking, unusual toileting and increased thirst among possible bladder-related signs. It recommends a vet check for suspected bladder problems or a change in urine⁷.

Those signs do not prove that a urinary condition caused the mounting. They are additional information for the vet to investigate. The practice may need an examination and urine testing, with further tests depending on the findings⁷.

Respond calmly and make the next occasion easier

PDSA recommends avoiding punishment and using a distraction followed by a familiar behaviour, such as sitting, which you then reward. It also suggests reducing relevant triggers. An occasional, non-disruptive episode may not need a training programme¹.

UC Davis similarly recommends identifying the reason, teaching alternatives and rewarding the requested response rather than the mounting. It advises against physical punishment. A record of the circumstances can help the veterinary assessment².

The AVSAB's broader advice is to address the cause and reinforce an appropriate alternative, rather than trying to force submission. That remains relevant when an awkward moment tempts everyone to react quickly³.

This is an account of events, not a reason to repeat one for a better video. “I couldn't see the beginning” or “I don't know what triggered it” can be useful entries. They keep a guess from becoming part of the history.

A calm household plan starts with a shared understanding of the particular problem. Agree who will seek advice, what information they will bring and how you will follow the resulting plan. Include the ordinary practical questions: who visits, which dogs meet, and what happens during busy moments? The aim is comfortable, safer interactions, without making a dog's behaviour a source of shame.

Sources and further reading7 sources

The small numbers in the article link to the source behind each fact. Sources open on their own websites.

1. Humping Behaviour in DogsPDSA
2. Inappropriate MountingUC Davis School of Veterinary Medicine, Clinical Animal Behavior Service
3. Position Statement on the Use of Dominance Theory in Behavior Modification of AnimalsAmerican Veterinary Society of Animal Behavior
4. Effects of castration on problem behaviors in male dogs with reference to age and duration of behaviorJournal of the American Veterinary Medical Association
5. Desexing dogs as a means of decreasing the generally regarded sexually dimorphic behaviors of urine marking, mounting, and roamingJournal of Veterinary Behavior
6. BVA and BSAVA policy position on Neutering of Cats and DogsBritish Veterinary Association and British Small Animal Veterinary Association
7. Urine and bladder problems in dogsPDSA