First Day in the Yard
Dogs have extremely sensitive senses; they can hear sounds waves and smell scents thousands of times stronger than humans. Hearing things we did not even know exist, and also being able to sniff out cancer.
source: boredpanda.com
Their brain even maps out the terrain in front of them using just the sense of smell! This little guy must have felt like he was in an amusement park when he first saw his backyard!