23/08/2026
🐾 CAN DOGS SMELL THE PASSAGE OF TIME?
Have you ever noticed your dog becoming more alert shortly before you usually arrive home?
Perhaps they move towards the door, start watching the window or suddenly seem to know that someone is about to return.
It can feel almost as though they can tell the time.
But could part of the answer be hidden in something we humans barely notice at all?
SCENT. 👃
Dogs live in a world that is profoundly shaped by smell.
While we tend to experience time through clocks, calendars and schedules, dogs may be able to gather information from changes in the environment, including changes in odour.
🧠 SO, CAN DOGS ACTUALLY “SMELL TIME”?
This is a fascinating scientific question, but we need to be careful not to overstate what we know.
The idea is that when you leave home, your scent remains behind. Over time, the concentration and composition of odours in the environment can change.
A dog may be capable of detecting some of these changes.
This has led scientists and researchers to ask whether changing scent information could provide dogs with clues about the passage of time.
It is an intriguing possibility, but it has not yet been conclusively demonstrated that dogs can accurately estimate when you will return home simply by measuring how much your scent has faded.
🐾 WHAT WE DO KNOW
Dogs have an extraordinary ability to detect, discriminate and respond to odours.
Scent is not simply a background smell to a dog.
It is INFORMATION.
A scent can provide clues about:
🐾 Who has been there
🐾 Which individual left the scent
🐾 Where they travelled
🐾 Which direction they may have gone
🐾 How scent conditions have changed
🐾 What is happening in the environment
And because odours are dynamic rather than static, a dog's olfactory world is constantly changing.
👃 YOUR DOG MAY ALSO USE OTHER CLUES
If your dog appears to know when you are coming home, scent may be only one part of the story.
Dogs are remarkably good at learning patterns and predicting events.
They may notice:
🚗 Changes in sounds outside
🏡 Activity around the home
🕰️ Your regular daily routine
👨👩👧👦 The behaviour of other people in the household
🌅 Changes in light and environmental activity
👂 Familiar sounds associated with your return
Your dog may not be “reading the clock”.
Instead, they may be gathering and combining an extraordinary amount of information that we barely notice.
🔬 THE BIGGER LESSON
This is one of the reasons I find canine olfaction so fascinating.
We often underestimate how differently dogs experience the world.
For us, a room may simply look familiar.
For a dog, that same room may contain a constantly changing landscape of scent.
Every open door.
Every person who walks through.
Every breeze.
Every meal prepared.
Every animal that passes outside.
Every hour that passes.
The environment is leaving information behind.
🐾 SO, CAN DOGS SMELL TIME?
The most scientifically accurate answer is:
Possibly, in some way, but we don't yet fully understand exactly how dogs perceive the passage of time or which cues they use to anticipate events such as their owner's return.
The fading and changing of scent is a fascinating hypothesis.
But the truth is that the canine nose, and the canine brain processing all that information, still has a great deal to teach us.
And perhaps that is the most incredible part.
Your dog may be experiencing a world of information that is quite literally invisible to you. 🐾
Donna Williams,
Emerald Park Border Collies.
[www.emeraldparkbc.com]
"My mission is to improve the life of at least one dog today!"