He was doing something completely natural.
For humans, walking is often about getting somewhere.
For dogs, the journey itself can be an investigation.
A tree isn’t just a tree.
A sidewalk isn’t just a sidewalk.
A patch of grass isn’t just grass.
Each place can contain odors left behind by animals, people, food, plants, and the environment.
And your dog has a sensory system built specifically to investigate those clues.
That’s why giving a dog reasonable opportunities to sniff can be a form of enrichment. AKC guidance emphasizes that sniffing helps dogs gather information and can provide mental stimulation.
Of course, that doesn’t mean your dog should be allowed to sniff absolutely everything.
You still need to consider safety, traffic, harmful substances, other animals, and other people’s comfort.
And if your dog becomes obsessive about sniffing or suddenly develops a dramatic change in behavior, it’s worth discussing the change with a veterinarian or qualified behavior professional.