Tilting Their Head to the Side
Many people use a higher pitch when speaking to their dogs. When you speak to your dog in a “doggie” voice, they will occasionally tilt their head to the side as if they understand what you’re saying. Dogs can read and respond to your body language and vocal cues very well.
They can recognize a variety of words, so it’s possible they’re listening for words and inflections they associate with enjoyable activities such as a treat, a walk, or being outside. According to some experts, dogs tilt their heads to the side to adjust their outer ears in order to better pinpoint the noise.
Sniffing the Air
Dogs’ noses serve a variety of functions. Dogs have 220 million olfactory receptors compared to 5 million in humans. Dogs’ noses are superior to humans’ by 1,000 times. When they sniff the air, it could mean they’re trying to track prey or that they sense danger approaching.
They will be completely still during this time. They remain completely silent in order to avoid being seen by their prey. Dogs, like people, can smell the differences between people and dogs. Even identical twins can smell the difference between family members!