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Showing posts with label Bradley Smith. Show all posts
Showing posts with label Bradley Smith. Show all posts

31 August 2015

Science wants to know about the dog in your bed

Science wants to know about the dog in your bed



Hi Mia and Julie,

Out of all the potential sleeping places in the house, I’m pretty sure your four-legged companion would prefer to sleep in your bed! Does yours?

The decision to let your pet into your bed is a topic that often divides owners, but it might just be more common than you think. Around half of pet owners sleep alongside their pets. The luckiest seem to be dogs (although Great Danes probably miss out here) and cats. It is believed that around 40-50% of pet owners sleep alongside their pets - many of whom, go to extreme lengths to accommodate them (like the guy below). 

Yet for such a common practice, we know relatively little about how and why people do it, or the implications. Do dog and cat owners jeopardise their sleep quality to accommodate their animal companions in their bed or bedroom? Think about when your dog needs to go out for a pee at 2am, or wakes you before your alarm goes off in the morning because they are ready to play, or hungry for breakfast. Or what about the point in the night when the cat decides your face is the most comfortable place to sleep? After all, dogs and cat have completely different sleep needs and circadian rhythms to humans, and are much more sensitive to stimuli, even when asleep. 


A lot of the information that exists on this topic tends to focus on the health and hygiene implications (e.g. transfer of diseases, asthma and allergies). This is something I can related to. The day my wife and I watched our border collie roll around in fresh poo was the day we knew she was never going to join us in our bed…ever! But in reality, there is no real health risks, so long as you keep your pet clean and healthy.

I have been involved in several studies with colleague of mine, Dr Kirrilly Thompson, seeking to gain an understanding of this topic. First, in a survey of the sleep behaviours of 10,000 Australians, we gained some preliminary insight. We found that around 1 in 10 Australians bed-shared with their pet (this excluded those that allow their animals to sleep on the bedroom floor). 

We found 3 ways that human sleep practices were impacted:
  1. It took pet bed-sharers longer than non-pet bed-sharers to get to sleep 
  2. Pet bed-sharers woke up more tired, and 
  3. Pet bed-sharers were more likely to be woken during the night from dogs barking and animal noises.

It seems that there is a lot to this relationship, and many people are willing to make sacrifices to their own sleep. Maybe its because our pets provide us with a sense of security and comfort, or perhaps it’s the only way to keep the animal from causing more problems!

In a follow-up study, with our honours student Peta Hazelton, we conducted the first in-depth look into human-dog co-sleeping. The study, which included an Australian only sample, revealed the rate of human-dog co-sleeping was high (69%) amongst the 1,328 dog owners we sampled.

The most common dog sleeping location was in the bedroom, on top of the covers (34%), followed by in the bedroom on the floor (22%), in the house but not in the bedroom (21%), in the bed and under the covers (13%), and 10% of dogs slept outside. Heat map images revealed when two people are in a double (or larger) bed, dogs frequently slept between, or at the feet of couple. When one person is in a double (or larger) bed, dogs generally slept at chest level, presumably opposite participants. For those in a single bed, the dog often slept on the floor beside the bed.

So why do dog owners choose to bed share? 
The study revealed that people's motivations to co-sleep are diverse, with responses including for dog behavioural issues (barking or destructive behaviours if not in the bedroom), health reasons (needed to keep seizure alert dog nearby), owner’s attitude (viewing the dog as a family member or ‘pack’), factors out of their control (participant’s human sleeping partner or the dog made the decision), logistics (nowhere else for the dog to sleep), routine or habit (not wanting to disrupt the dog’s nightly routine), and becoming dependant on the dog’s presence to sleep (as well as feeling the dog did not disrupt sleep, therefore no need to alter the arrangement).

But not all dog owners felt the same, with many reasons given as to why they chose not to co-sleep with their dog. These included, dog behavioural issues (wanting to avoid the dog developing dominant or dependent behaviour), health (co-sleeping would provoke allergies or is unhygienic), disruptive behaviours (the dog is too restless), interpersonal relationships (human sleeping partner would not allow it or it would impede intimacy), dog characteristics (size of the dog), owner’s attitude (the dog doesn’t belong in the house), and logistics (owning too many dogs to co-sleep).  
Location of dog’s sleeping position (chest) for participants that slept on a double, queen or king size bed and two people in the bed, n = 517
In the end, co-sleeping (with whatever species) naturally disturbs our sleep, yet people continue to do it. But given all the health benefits of pet ownership, the good certainly outweighs the bad. It’s up to the individual owner whether they choose to co-sleep with their animal/s, or not.

We are currently in the process of conducting another study (with our honours student Jessica Mack), this time focussing on the impact of co-sleeping on sleep quality and quantity. 

If you are one of the many dog owners that bed-share with your dog, we would love if you could complete our online survey and share it with others who might be interested.

Access the survey here: tinyurl.com/humandogcosleeping

Tell us - where did your dog sleep last night?

Dr Bradley Smith BPsych(Hons) PhD 
Lecturer & Senior Post-doctoral Research Fellow
Appleton Institute, School of Human Health & Social Sciences 
CQUniversity Adelaide, Australia


If you found this interesting, you may also enjoy our previous guest post by Bradley Smith: Take a walk on the wild side: Dingo science, or see all of our guest contributors.

Further information:

Smith, B., Thompson, K., Clarkson, L., Dawson, D. (2014). The prevalence and implicationsof human-animal co-sleeping in an Australian sample. Anthrozoös, 27 (4), 543–551.

There is a Channel 7 Today Tonight segment relating to human-animal co-sleeping that aired on Jan 29, 2015:

 © 2015 Bradley Smith | Do You Believe in Dog?
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3 October 2013

Take a walk on the wild side: Dingo science

Take a walk on the wild side: Dingo science


Image: Bradley Smith
Hi Mia and Julie,

As one of the few in the world exploring the ‘mind’ of the dingo, the highly controversial wild dog of Australia, I consider myself quite a rare ‘breed’ of scientist. So I thought I would let you know about some of the recent work I have done with dingoes, including a few world first discoveries. It seems dingoes are becoming just as famous for solving problems as they are for causing them!

I find the differences between the way wild and domestic dogs think and behave fascinating. 

The dingo just happens to be a great model for investigating the influence that domestication has on the canine mind because they are considered by many to be a ‘proto dog’. That is, they are thought to be one of the earliest forms of the domestic dog. Not a domestic dog as we know today, but one representing an early transition from the more-wolf-like common ancestor, to dog. What makes dingoes really interesting and unique is that they are wild living and genetically, behaviourally and physically more wolf-like than dog-like, yet are able to communicate with humans (see my paper on their ability to follow human social cues) and in the right environments, can be successful pets - whereas wolves cannot.
Dr Bradley Smith
(and dingo pup friend!)

Domestic dogs are what we call ‘socially’ intelligent , which means they are highly adept at communicating with people. For example, they can read our behaviours, and express to us what they want. This has a lot to do with why we love them so much, why we can create such a close bond, and why they are such successful companions. But this social intelligence may have come at a cost. When faced with a problem that they cannot solve, dogs will often ‘look’ towards their owners for help instead of trying to solve it on their own. The dog’s wild counterparts - wolves and dingoes - however, have to solve problems on their own. 

In problem solving situations where a human is present, wild canids rarely look back to a human for assistance, and choose to keep trying to solve the task or simply give up (for more information see my experiment on looking back behaviour).  

It seems to me that humans have become tools in the dog’s problem solving ‘bag of tricks’, and the selection pressure for independent problem solving has been relaxed. It's not that dogs are lazy or dumb - they know exactly what they want, and how to get it!

Image: Bradley Smith
When talking about 'intelligence' in animals it is important to distinguish between different kinds of behaviour and the thinking that goes on behind them. Dogs performing fancy tricks, although impressive and fun to show your guests at parties, are learnt through operant or classical conditioning and therefore not really abilities we would consider higher-order. Perhaps the best example is tool use, which has only been reported in a select group of species. Tool-using animals are those that establish the effective orientation of an object to alter some condition and attain an incentive. This has not been reported in any canid (wild or domestic), although there are many anecdotal accounts floating around the You Tube.

So to my surprise, when I began working with dingoes at the Dingo Discovery Centre in Melbourne, Australia, and I came across a dingo that had learned to use tools! Sterling, a sub-adult male had discovered that by manipulating things in his environment, he could get up to all sorts of mischief. In one instance Sterling dragged a plastic table from one end of his enclosure to the other. By jumping on the repositioned table he was able to reach a parcel of food that was placed high on the mesh of his enclosure. Take a look:


On another occasion, I captured Sterling moving around his portable plastic kennel. He would use the kennel as a lookout to see his neighbours over the 1m high opaque wall of his enclosure. His manipulation of objects instantly remind me of Wolfgang Kohlers observations of chimpanzees stacking crates in order to reach bananas that were hanging out of reach.

Another relatively recent phenomena, considered unique to higher order creatures, are the reactions of animals to the death of conspecifics. Originally thought to only be evident in primates, it has now been documented in a variety of species such as elephants and dolphins. Similar behaviour had yet to be reported in any domestic or wild canid until an ecologist friend of mine Rob Appleby (a PhD candidate from Griffith University) spotted a dingo mother and four littermates respond rather remarkably to the death of a pup on Fraser Island (Queensland, Australia). Over multiple days, the mother transported the pup on at least four instances around the island (one of which he was able to capture on video). She did this by picking up the pup (approximately 3 months old) with her mouth and carrying it away. 
Image: Bradley Smith

To me, such behaviour is no real shock. Given that they are highly social species, have high-order cognitive ability, and live in complex societies (e.g., prolonged periods of parental care, strong mother-infant bond). Instead of making any real assertions that dingoes mourn the dead, we chose to interpret the behaviour in more evolutionary or adaptive terms. That is, that the mother was adopting a ‘wait and see’ approach to her deceased pup which still appeared physically healthy and intact. I will let you decide what you make of this behaviour!

I hope you have enjoyed reading about some of the amazing antics that dingoes have been up to recently, and also learned a few more ways why canines are so amazing! I think we have only reached the tip of the iceberg in terms of our understanding of the canine brain, and I look forward to exploring it further with you.
Image: Bradley Smith


Bradley Smith
Senior Post-doctoral Research Fellow
Appleton Institute
Central Queensland University
@howlingdingo 


Further reading:

Smith B.P. & Litchfield C.A. (2010). Dingoes (Canis dingo) can use human social cues to locate hidden food, 
Animal Cognition, 13 (2) 367-376. DOI: 

Smith B.P., Appleby R.G. & Litchfield C.A. (2012). Spontaneous tool-use: An observation of a dingo (Canis dingo) using a table to access an out-of-reach food reward, Behavioural Processes, 89 (3) 219-224. DOI:

Appleby R., Smith B. & Jones D. (2013). Observations of a free-ranging adult female dingo (Canis dingo) and littermates’ responses to the death of a pup, Behavioural Processes, 96 42-46. DOI:


Smith B.P. & Litchfield C.A. Looking back at ‘looking back’: operationalising referential gaze for dingoes in an unsolvable task, Animal Cognition, DOI:

© 2013 Bradley Smith | Do You Believe in Dog?
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