This claim is unverified because the provided evidence confirms that dogs can locate odors using smell but does not reliably establish that dogs generally detect or follow scents from at least one mile away.
Unverified
Dogs nose can sniff a scent miles away.
Dogs display owner-specific expectations based on olfaction
Source: nature.com
At a glance
Verified August 20, 2026Key Evidence
The study titled "Olfaction-based Detection Distance" directly examined how far dogs could detect and follow tortoise odor, but the supplied evidence does not report a one-mile result.
A-Z Animals provides the only explicit mileage figure, up to 12 miles, but it is a secondary assertion without enough methodological detail to verify it.
Other sources confirm that dogs can recognize and track scents, not that most dogs routinely detect odors miles away.
The reporting
What the Evidence Shows
Dogs have a highly developed sense of smell, and the supplied studies support their ability to detect, discriminate, and follow odors. The 2008 tortoise-odor study developed a method for measuring how far dogs could detect and follow a scent, but the available extract does not report a distance of one mile or more. The 2021 Scientific Reports study also documented olfactory tracking, but involved a short trail delay and did not test mile-scale detection.
One secondary article from A-Z Animals claims that dogs can follow a scent for up to 12 miles. However, the supplied material gives no original study, measurement method, scent type, number or training of dogs, environmental conditions, or success criteria. That makes it insufficient to verify the specific distance claim.
The wording also implies that detecting a scent miles away is a general ability of dogs. The available evidence mainly concerns trained scent-detection dogs or unspecified conditions, not representative testing of ordinary dogs across breeds, odors, terrain, weather, and wind conditions. Therefore, the sources support canine olfactory ability but do not establish the claimed range or its generality.
Primary trail
Verified Sources4
Open source