If you’ve spent time around other dog owners lately, you’ve probably heard someone raving about “nose work” or “scent work” – this popular enrichment activity that has dog trainers and enthusiasts singing its praises. But between Instagram videos of excited dogs searching for hidden scents and trainers promising mental stimulation, you might be wondering: is this actually good for my dog? And perhaps more importantly – what’s actually happening inside my dog’s body and nervous system when they’re doing it?
Our founder, Aidan, recently worked with a team of researchers at the University of Adelaide including Jade Fountain (who began her dog training career right here in Tassie!) hoping to answer exactly these questions, and the findings are genuinely fascinating. Using heart rate monitors and careful behavioral observation, they were able to look inside what’s really going on during a scent work session. Here’s what they discovered, and why it matters for your dog.
The Big Question: Is Scent Work Just Fun, or Is It Actually Enriching?
Scent work comes from working detection dogs—think police and customs dogs trained to find drugs or explosives. For pet dogs, it’s adapted as a recreational activity where dogs use their incredible sense of smell to locate hidden odors in exchange for treats or toys. Trainers and dog owners have long believed this activity benefits dogs’ mental, emotional, and physical well-being. But belief and science aren’t always the same thing.
The research team wanted to understand what actually happens physiologically when your dog is engaged in scent work. They monitored 21 companion dogs wearing heart rate monitors as they performed scent searches, compared to a control activity of just walking around the same room but without hides. They also watched them closely to note their behavior and any signs of stress.
What They Found: Activation Without Stress
Here’s where it gets interesting. During scent work, dogs’ heart rates increased significantly – averaging 130 beats per minute during the search compared to 122 beats per minute during regular walking. To put this in perspective, this is the kind of physiological arousal you’d expect from an engaging, stimulating activity.
But here’s the crucial part: this increased heart rate wasn’t accompanied by any obvious signs of stress. Dogs didn’t display the behaviors we’d normally associate with anxiety or worry. There was no excessive panting, whining, lip-licking, or agitation during the search task. Instead, what was observed were signs of positive engagement. Dogs held their tails higher during scent work than during the control task – a behavior associated with alertness. Their engagement with the task was clear and consistent.
This distinction matters enormously. There’s a difference between an elevated heart rate from excitement and engagement, and an elevated heart rate from stress. What was documented was the former.
Why Does This Happen? Understanding the Arousal Response
When your dog engages in goal-directed sniffing – searching for and finding a scent – multiple things happen simultaneously. The act of sniffing itself, performed at high frequency, naturally influences their nervous system toward activation. Add to that the excitement of the task, the anticipation of finding something, and the reward that follows, and you’ve got a perfect recipe for healthy physiological arousal.
The key word here is “healthy.” Your dog’s autonomic nervous system (the system controlling unconscious functions like heart rate) becomes activated, but not overwhelmed. The dog’s body is essentially saying “this is engaging, this is important, I’m focused” – not “I’m in danger or distressed.”
The Behaviour Evidence: What Your Dog Is Really Experiencing
Beyond the heart rate data, behavior tells us a lot. During the study, researchers noticed something interesting: dogs panted less during scent work than during the control walking condition. This is notable because panting can sometimes indicate thermal regulation or mild stress. The fact that scent work didn’t trigger more panting suggests the dogs weren’t becoming stressed by the activity.
What they did see were behavioral indicators of positive engagement: dogs working purposefully through the environment, tail carriage indicating alertness, and focused search behavior. When dogs found the scents, they performed their trained alert behaviors and engaged readily with the activity.
More importantly for dog welfare: they observed no fear-based behaviors, no avoidance, and no signs of the distress that would signal something was wrong.
Recovery: The Immediate Aftermath Matters Too
They also tracked what happened after the scent work sessions. Heart rates returned to baseline at similar rates whether dogs had just completed a scent search or the control walk. This tells us that scent work doesn’t leave dogs in a state of prolonged arousal. They recover quickly, settling back down.
One thing they noted is that dogs don’t show immediate relaxation benefits right after scent work—the idea that scent work “tires dogs out” in a way that makes them calm isn’t quite supported by what was observed. Instead, scent work is better understood as a genuinely engaging activity that activates your dog physically and mentally, similar to how a good workout affects humans. The benefits come from the engagement itself and the enrichment it provides, not from “wearing the dog out.”
What This Means for Your Dog
So, what should you take from this research if you’re considering scent work for your dog? Several things:
Scent work is genuinely enriching. It’s not just play or exercise—it’s an activity that meaningfully engages your dog’s most powerful sense and their problem-solving abilities. This mental stimulation is valuable for dogs’ overall well-being.
It’s physically and mentally safe. The physiological activation we documented happens without stress or anxiety. Your dog can engage in scent work with confidence, and you can feel confident that their body is responding positively.
Every dog can benefit. Scent work isn’t just for working dogs or highly trained dogs. In this study, dogs of various ages and experience levels were observed, from complete beginners to advanced competitors. All of them showed the same positive physiological and behavioral patterns.
It supports your dog’s natural abilities. Dogs experience the world through their nose. Scent work lets them do what they’re naturally brilliant at, which is inherently rewarding and satisfying for them.
Getting Started With Scent Work
If you’re intrigued by the research and thinking about introducing scent work to your dog, the good news is that it’s accessible to dogs of all experience levels. You don’t need to wait for your dog to be perfectly trained or at a certain age. Many dogs find scent work intuitive and engaging right from the start.
At Every Dog, we offer Introduction to Scent Work classes designed to teach you and your dog the fundamentals of this engaging activity. Whether you’re curious about the benefits for your dog’s well-being or looking for a new way to bond with your dog and provide enrichment, scent work might be exactly what you’re looking for.
The research is clear: scent work activates your dog’s mind and body in positive, beneficial ways. It’s engaging without being stressful, enriching without being overwhelming. Your dog’s remarkable sense of smell is one of their greatest gifts—scent work is simply a way to help them use it, enjoy it, and thrive because of it.
About the Research
This blog post is based on “Heart rate variability and behaviour in dogs during and after scent work,” published in Applied Animal Behaviour Science in 2026. The research was conducted by Jade Fountain, Todd J. McWhorter, Marie-Claire Seeley, Aidan D. Bindoff, Kimberley Handley, Robert Hewings, and Susan J. Hazel at the University of Adelaide and associated institutions. The study monitored 21 companion dogs with scent work experience using ECG monitors to measure physiological responses and behavioral observation to assess engagement and welfare during scent searches compared to control activities.