Why does my dog do that?
Why does my dog roll in smelly things like dead animals or manure?
Last updated 23 September 2026 · How we write and check this
Short answer
Rolling in strong smelling substances is a well documented instinct thought to relate to masking a dog's own scent for hunting purposes, or in some theories bringing an interesting scent back to share with the pack, both leftovers from wild ancestry that remain strong even in dogs with no practical need to hunt.
The scent masking theory
Wild canines are thought to have rolled in strong odors, carrion, feces, or other animal scents, partly to disguise their own natural smell from prey animals while stalking, a hunting advantage that no longer serves any real purpose in a domestic dog but remains a deeply wired instinct nonetheless.
The information sharing theory
An alternative and not mutually exclusive theory suggests rolling in a novel scent lets a dog bring information back to the rest of the pack, essentially reporting an interesting find, which may explain why some dogs seem especially drawn to rolling in genuinely unusual smells rather than familiar, everyday ones.
Managing the behavior
There is no reliable way to fully train this instinct away, so a solid recall cue used the moment you spot a tempting smell, along with keeping walks on a leash in areas known for wildlife carcasses, tends to work better than trying to eliminate the urge entirely.
Key takeaways
- Rolling in strong smells likely traces back to masking scent for hunting purposes.
- An alternative theory suggests it helps a dog share interesting scent information with others.
- The instinct remains strong even in dogs with no practical need to hunt.
- A reliable recall used early is more effective than trying to eliminate the urge entirely.