A video capturing a dog's "unconditional" love for her owner has left social media users in tears.

The clip was posted by @paisleypark28, the TikTok account of a beagle called Paisley, and has amassed 1.8 million views since it was first shared on June 11.

A message overlaid on the video reads: "The moment the beagle sees dad's car at daycare."

The footage shows the dog sitting on a green turf outdoors. Appearing to recognize something in the distance, she is later seen walking toward the street and howling.

The video later shows the beagle running out of a door toward a gate where the owner is waiting. The pup continues to howl and jumps up on the person.

Another note across the screen reads "We don't deserve dogs" before the clip ends. A caption shared with the post simply says: "Unconditional."

The beagle's response to her owner is not surprising because our canine companions share a unique bond with their owners.

A May 2013 study published in PLOS One stated: "This unique relationship between adult dogs and their human owners bears a remarkable resemblance to an infant attachment bond: dogs are dependent on human care and their behavior seems specifically geared to engage their owners' care-giving system."

While it's unknown exactly how the dog may have realized her owner's arrival so quickly, it could have been down to a scent, as the sense of smell is "a principle sensory modality for dogs," according to a January 2020 study published in the International Journal of Comparative Psychology.

The study used natural body odor captured on a T-shirt to find that "dogs habituated to a familiar odor and dishabituated to an unfamiliar odor."

Daniel Marston, a psychologist specializing in cognitive-behavioral therapy, said in a September 2020 article for Psychology Today: "What was particularly interesting about this study [from January 2020] was that it addressed how dogs reacted and used the smell of a familiar person even if that person was not actually there."

Dogs also have heightened visual and hearing abilities, so if "the person was actually there it would not be certain whether the dog actually smelled the person most or might have heard some small noise the person made," Marston added.

'That's Love'

TikTok users were moved by the beagle's response to her owner in the viral clip.

Alexa Ramirez7983 said: "Awwwww Beautiful baby. so happy to see dad."

"That's love 100 percent" said dorothy mczeal.

Tali02692 commented: "Awe!!! This is so sweet. So happy to see Daddy came back."

Mattie Mcclary629 wrote, "They are so loving."

Newsweek reached out to the original poster for comment via TikTok. This video has not been independently verified.

Do you have funny and adorable videos or pictures of your pet you want to share? Send them to life@newsweek.com with some details about your best friend and they could appear in our Pet of the Week lineup.