What is the dogs strongest sense?

Answer 1

It depends on the breed of dog, most hounds and most working breeds rely mainly on there sense of smell; but some breeds like Greyounds, Salukis, Afghan hounds and all of the Sighthound breeds rely mainly on there vision.

Answer 2

A dog's strongest sense is typically their sense of smell. Dogs have many more olfactory receptors than humans, allowing them to detect scents at incredibly low concentrations and track scents over long distances.