Short answer: sniffing is how dogs take in information, and it is good for them. Letting your dog sniff is part of the walk, not a delay.
What VCA and the AKC say
VCA says dogs have up to 300 million scent receptors, depending on the breed, and that sniffing is a great way to provide mental stimulation. When you let your dog pause and sniff, you are improving their mental health. The AKC says sniffing and scratching take concentration and time, and that giving your dog the chance to leave their own messages helps.
A balance
You can have rules and still allow sniffing. Reward loose leash walking with sniff breaks. See a sniff walk and a dog who pulls to sniff.
Get the right help
If sniffing turns into eating things from the ground, ask your vet.
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Sources
Sources & care notes
Frequently asked questions
Why does my dog sniff so much?
The nose is their main information channel, with tens of millions more scent receptors than yours, depending on breed.
Is all that sniffing a good thing?
Yes. It is mental stimulation, and letting your dog pause and sniff improves the walk for them.
Can I have rules and still allow sniffing?
Yes. Reward loose leash walking with sniff breaks, so both skills grow together.
When does sniffing need attention?
If sniffing turns into eating things from the ground, ask your vet.
