dog can smell how far away

Dogs have an incredible sense of smell, and the distance at which they can detect a scent can vary greatly depending on several factors, such as:

1. Breed: Some breeds, like Bloodhounds and German Shepherds, are known for their exceptional tracking abilities and can detect scents at greater distances.
2. Wind direction and speed: A dog’s sense of smell can be affected by wind direction and speed. If the wind is blowing towards the dog, it can carry scents from farther away.
3. Type of scent: Dogs can detect different types of scents, such as pheromones, food, and human scents, at varying distances.
4. Individual dog’s ability: Each dog’s sense of smell can vary, and some dogs may be more sensitive to certain scents than others.

That being said, here are some general estimates of how far away a dog can smell:

* A Bloodhound can detect a scent that is 1,000 to 2,000 hours old (about 40-80 days) and can follow it for miles.
* A German Shepherd can detect a scent that is several hundred feet away.
* A typical household dog can detect a scent that is around 10-100 feet away.

In terms of specific distances, dogs can detect scents at the following ranges:

* 1-5 miles (1.6-8 kilometers) away: Bloodhounds and other tracking breeds can detect scents at this range.
* 1/4 to 1 mile (400-1,600 meters) away: German Shepherds and other breeds with a strong sense of smell can detect scents at this range.
* 10-100 feet (3-30 meters) away: Most household dogs can detect scents at this range.

Keep in mind that these are rough estimates, and the actual distance at which a dog can detect a scent can vary greatly depending on the individual dog and the specific circumstances.