All About Your Dog’s Sense of Smell

If you’re a dog owner you’re probably familiar with the constant stopping so they can sniff and you’ll likely respond to this by nudging them along – but did you know that sniffing is really important for them? Your dog’s sense of smell is pretty much a super power and their daily sniff routine can help them identify what’s happening in their environment as well as lower their stress levels.

Getting out for a walk is one of life’s joys and it gives us a chance to experience all the sights and sounds of the great outdoors - whether on our regular walks or exploring new places. As we soak up these sensory experiences, we often forget that our dogs see the world very differently to us - and while we are looking at the sights, our dog is discovering far more about the area by its smells.

So often owners get irritated that while they want to stride off across the countryside or have an active walk around the park to make sure their dog gets their daily exercise, their dog pretty much ignores them while he puts his nose down and ‘just’ sniffs.

It’s easy to drag them away thinking they are wasting precious exercise time but that’s purely because we do not have anything even close to a dogs sense of smell, and we don’t understand just how fabulous our dog’s nose is - or that this incredible ability means that unlike us, they see the world in smell-o-vision.

While they are sniffing, they are finding out about the area, who lives there, who has passed by recently, and even what kind of mood they are in. All the time they are sniffing, they are processing information about the environment and who and what is in it.

They possess up to 300 million olfactory receptors in their noses compared to about six million in ours and the part of their brains that analyses and processes scents is (proportionally) 40 times greater than ours.

While these numbers mean little to us - as we are visual and so we think and process what we see rather than being scent-aware - if you made an analogy to sight, what we can see at around a third of a mile a dog could see more than 3,000 miles away. Now are you a bit more impressed with your dog’s sense of smell?

Dogs can detect cancer cells, explosives, drugs, and track and find lost people or animals - all by using the power of their noses and the part of their brain that analyses and processes those scents.

Why do dogs spend so much time sniffing?

It’s very easy to disregard what we don’t understand but part of living with a dog is to recognise that a dog’s sense of smell is important to them in a variety of ways. First of all, it’s enjoyable. In the same way that we look around us and take pleasure in that, our dogs sniff and take equal joy in that. Secondly it is a way to find out about the environment and what (or who) it might contain - and if it is safe. And they are picking up information left by other dogs (checking their wee-mails!) - and they are processing all this ever-changing information about the area and its inhabitants while we think they are just wasting time sniffing.

Sniffing has so many benefits for your dog

As owners we need to give our dogs time to sniff. Most of us know that five minutes spent training tires our dog as much as an hour’s physical exercise but we don’t always recognise that five minutes spent sniffing does the same. It’s not just their noses that are working, it’s a large part of their brains too. For active dogs, or for dogs who start their walks totally uncontrollable and either pulling on the lead in their excitement, or else whizzing around all over the place, time spent sniffing can take the edge off their unfocussed energy.

For worried reactive dogs, sniffing can help them feel more secure - as they have spent time working out what is out there and whether it needs to be worried about or whether, far more likely, it is safe.

Perhaps more importantly, for all dogs a chance to sniff fulfils a major part of their sensory needs - as much as physical and mental exercise does and as much as play does. Sniffing makes them happy and gives them an outlet for their hard-wired natural behaviours. So often we ignore this vital part of our dogs’ needs because we just don’t understand it.

How to become ‘Nose Aware’ on your walks:

Now that you know all about your dogs sense of smell, why not take a look at other ways in which your dog discovers the world around them? Take a look at our article on dogs' teeth, which covers everything from how many they have, to how to look after them!