Dogs are so closely tied to humans that at times they even resemble us in their behaviors. When a dog acts like a child, reaching to be picked up or demanding that we watch them play with their toys, we hardly bat an eye at their behavior. Some dog tendencies, on the other hand, are so uniquely dog-like that they can't help but remind us that we're dealing with a separate species. Why do dogs tilt their heads when we speak to them? Why do they chase their tails? Here are the answers for at least some educated guesses on these and other quirky dog behaviors.
Why Do Dogs Tilt Their Heads?

While head tilting has never been studied scientifically, according to Mental Floss, dog behaviorists have a number of theories as to why your dog sometimes cocks his head to the side when you speak to him.
- He's trying to understand you. Dogs actually understand the meanings behind a number of words and voice inflections. It's possible that when your dog appears to be listening attentively by cocking his head, that's exactly what he's doing. He's listening for words, phrases and voice inflections that have positive meanings and associations.
- He's trying to zone in on your voice. While dogs have excellent hearing, their ability to pinpoint the source and location of a sound is actually worse than that of a human. It could be that tilting the head helps a dog identify where the sound of your voice is coming from.
- He's trying to see you better. A theory put forth in Psychology Today points out that a dog's muzzle partially blocks his view of your face. Tilting his head helps him see around his muzzle so he can read your entire facial expression and pick up on cues that tell him whether you're happy with him.
- He knows it's cute ... sort of. While your dog probably doesn't actually understand the concept of cuteness, he does understand that you respond positively when he engages in this adorable behavior, which reinforces it. So he keeps doing it deliberately to get a positive reaction.
Why Do Dogs Kick with Their Back Feet after Relieving Themselves?
Dogs are territorial by nature. Whenever they relieve themselves, this serves as a territorial marker, according to the American Kennel Club. However, because many animals mark their territory in this fashion, dogs attach an additional message letting other animals know that the deposit was left behind specifically by them. Vetstreet adds that dogs have glands in their paws that secrete pheromones when they scratch their back paws in the earth. Essentially, this is your dog's way of adding his signature to his territorial marker.
Why Do Dogs Circle Before Lying Down?
This behavior is most likely a holdover from before dogs became domesticated, says Vetstreet. Your dog's wild ancestors would most likely circle the ground in order to soften the dirt or tamp down grass or leaves and make a little nest in which to lie. Scratching prior to lying down is also tied to this ancestral practice. Dogs in the wild would dig a hollow in the ground to sleep in, which would serve to regulate body temperature and provide some protection from the elements. These behaviors have apparently become so deeply ingrained in the species that even the cushiest indoor bed won't prevent your dog from doing them from time to time.
