Humans have around 5 million scent receptors. Some dogs have have over 200 million or MORE! Think how this can effect your training, especially while walking your dog. I always tell students they personally have to be more motivating than what the dog smells or sees. On your walk make it worth your dogs effort to pay attention to you. A great way to do this is slip them a piece of steak every once in awhile. If your dog finds that rewarding they will start paying attention to you more in hopes to get some more steak! Yum!