Imagine your nose is a tunnel. A short tunnel with nothing inside of it would allow water or air to flow through quickly. But, imagine putting obstacles in the tunnel to slow down the flow of water or air.
Your pup's nose is filled with tiny obstacles called turbinades. These structures vary in size and together they slow down the flow of air. This allows for plenty of time for the air to swirl, move and stagnate in the nose. Other features like long ears, wrinkled skins or fold, big jowls etc also help in the process of slowing down the flow of air.
Your Pug as a result can smell 50 times better than you can and your German Shepherd, 250 times better. In fact German Shepherds were successful at detecting a gas leak far under ground at a place in Canada years ago, that professional equipment could not detect.
So kiss that canine nose and tell your dog he smells wonderful.
Brent
