Why sniffing matters
Sniffari times the sniffing because the research says it's the part of the walk that does the most for the dog. Here's what that research actually shows.
Smell is most of how a dog reads the world
Dogs have on the order of 100 to 300 million scent receptors, against roughly 5 million in people, and can sniff many times a second. A sniff stop that looks like nothing to us is a dog reading the news.
PetMD: dog nose factsField study or secondary source — not peer-reviewed as far as we can tell.
Sniffing lowers a dog's pulse
A French field study measured dogs' pulse during walks. The more intensely a dog sniffed, the lower its pulse dropped. Sniffing isn't just information for a dog; it's how a dog calms down.
Reported by the Animal Humane SocietyField study or secondary source — not peer-reviewed as far as we can tell.
Sniffing makes dogs more optimistic
Researchers split 20 pet dogs into two groups for two weeks. One group played sniffing games, hunting for hidden treats with their noses. The other did the same amount of walking and got the same treats, but had to walk at heel with no sniffing. Afterwards, the sniffing dogs were more hopeful: shown a bowl that might or might not have food in it, they went to check it out sooner. The dogs that hadn't been allowed to sniff hung back. Same exercise, same rewards — the only difference was the sniffing.
Duranton & Horowitz, Applied Animal Behaviour Science, 2019Peer-reviewed study.
What we don't claim: that sniffing extends life, treats anxiety, or that there is a right number of minutes. The app shows how much of each walk was sniffing and never sets a goal.