Leash walking
Why does my dog pull toward food on the ground during walks?
Last updated 23 September 2026 · How we write and check this
Short answer
Dogs have a sense of smell estimated at 10,000 to 100,000 times more sensitive than a human's, so scraps that you cannot even see, like a dropped chip or old chewing gum, register strongly to your dog from several metres away. Pulling toward it is simply following a powerful scent cue, not disobedience.
Why scavenging pulls are so intense
Food related scents trigger a stronger, faster response than most other smells on a walk because they are directly tied to a survival instinct. This is why a dog that walks calmly past a barking dog might still lunge hard toward a piece of dropped bread.
Teaching a reliable leave it
Practice leave it at home first with low value items before expecting it to work on real food outdoors. Start by covering a treat with your hand, waiting for your dog to stop pawing or sniffing, then rewarding with a different, better treat from your pocket, not the covered one. Build this up over a week before testing it on walks.
Managing risk in the meantime
Until leave it is solid, scanning the ground ahead and steering around obvious scraps, plus keeping a short leash near areas with food waste such as outside cafes or bins, prevents most scavenging incidents before they start.
Key takeaways
- A dog's sense of smell is far more sensitive than a human's, making dropped food a strong pull trigger.
- Train leave it at home with low value items before relying on it around real food outdoors.
- Reward leave it with a different treat than the one being left, not the covered item itself.
- Scanning ahead and shortening the leash near food waste areas reduces risk while training progresses.