A professor of Ecology and Evolutionary Biology explains that dog humping is a natural behavior with multiple causes beyond mating. It can stem from excitement, stress, play, dominance, or emotional overload. The behavior is common and not inherently abnormal, though excessive humping may require training or veterinary attention. A citizen science project showed most episodes have no obvious reason, and gender or size often don't matter.
If your dog has ever embarrassed you by mounting another dog, a visitor's leg or even their favourite toy, don't assume they're looking for love.
According to an expert, humping is far more complex than most owners realise. Marc Bekoff, professor emeritus of Ecology and Evolutionary Biology at the University of Colorado, said it is a perfectly natural behaviour that can have a variety of different causes. And while mating is the most obvious reason, it's far from the only one.
Some dogs mount as a way of asserting dominance over another animal, while others do it simply because they are playing and have become overexcited. Certain pups even hump when they are overwhelmed by conflicting emotions such as excitement and stress.
'Mounting and humping are natural dog behaviours and are neither disgusting nor abnormal,' Professor Bekoff wrote on Psychology Today. However, he admitted it's possible some dogs are 'insatiable humpers' – which could warrant training or a trip to the vet. According to an expert, dogs may hump toys because they have become overexcited while playing Professor Bekoff explained that mounting can be a 'displacement behaviour' – an action triggered by emotional overload rather than a conscious goal.
A new visitor arriving at the house, for example, may prompt a dog to start humping because it is both excited and anxious. Boredom can also play a part, with some dogs developing the habit during quiet moments in the same way people might absent–mindedly scroll through their phones or switch on the television. Researchers have even observed dogs mounting during energetic 'zoomies', before immediately dashing off again as if nothing had happened.
In other cases, the behaviour appears to happen almost by accident when a dog finds itself in a particular position and a reflex takes over. As part of a long–running citizen science project, Professor Bekoff asked people to collect humping observations from local dog parks. Analysis of 312 humping encounters revealed there was no obvious difference in the likelihood of male or females being humpers or humpees.
'Size didn't seem to matter; on six occasions, a small dog tried to mount a much larger dog but slid off because they couldn't hold on,' Professor Bekoff said. Meeting a new person may prompt a dog to start humping because it is both excited and anxious Why dogs hump Overall, 65 per cent of mounting episodes appeared to happen for no obvious reason, he said.
Around 26 per cent occurred during play, while only nine per cent were best explained by dominance.
'It's possible that some dogs are insatiable humpers,' he said, referencing a story a man once told him about his dog called Reggie. This dog, a male, would mount 'anything, anyone at anytime' – including his water bowl, beach ball, other dogs from different orientations and human legs.
'While some mounting and humping might be 'inappropriate' or 'excessive' and need to be managed or controlled, we need to be careful of whose point of view we're taking,' he added. 'Mounting and humping are dog–appropriate actions. Of course, excessive mounting and humping may indicate a problem requiring training, a visit to the vet, or both.
' Some dogs, on the other hand, may be 'humpees' that invite this sort of behaviour. He concluded: 'Clearly, humping is more than simply looking for love in all the wrong places. Knowing why humping occurs surely will improve dog–human relationships.
' Read More Why you SHOULD let your dog sleep on the bed: Scientists finally settle the debate that has split pet owners - and reveal the surprising benefits of a nap with your pooch A study, published earlier this week, revealed that some dogs can have an unhealthy 'addiction' to their favourite toys. Scientists analysed data from more than 1,600 dogs and found that those with the highest toy motivation were more likely to struggle to calm down, stay highly aroused and sleep less during the day.
These intensely toy–driven dogs were more likely to be working or sporting breeds, such as German Shepherds and Terriers, with the behaviour often emerging in puppyhood. While a strong desire to play can be an asset, the researchers say extreme levels may affect a dog's ability to regulate its behaviour and could have implications for its welfare.
Dog Behavior Humping Mounting Pet Psychology Animal Emotions
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Understanding Canine Mounting: More Than Just a Mating BehaviorExpert explains that humping in dogs is a natural behavior with multiple causes beyond reproduction, including play, excitement, stress, and displacement. A citizen science project analyzed 312 incidents and found no significant gender or size differences, with 65% of mounting occurring without obvious reason, 26% during play, and 9% due to dominance. While generally normal, excessive mounting may require training or veterinary attention. The article also briefly mentions a separate study on dogs' addictive tendencies toward toys.
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