Dogs experience the world through scent
For dogs, scent isn't a bonus sense. It's a primary one. Sniffing engages exploration, information gathering and problem-solving in ways that are deeply natural for dogs. A walk where your dog gets to put their nose down is, for many dogs, more satisfying than a fast-paced run where they don't.
Modern life doesn't give dogs many opportunities to use their noses at their own pace. Structured sniff enrichment is a way to give some of that back.
A calmer dog usually needs a whole-picture approach. Not one miracle product.
The research on scent work is surprisingly positive
Studies examining scent training and scent-based enrichment found dogs generally tolerated scent exposure well when safe materials and handling protocols were used. Research in this space is still developing, but what exists is broadly encouraging.
Sniff walks, scatter feeding, and nose work games are low-cost, low-setup ways to add more olfactory enrichment to an ordinary day. You don't need anything elaborate.