Heart-wrenching footage of animals appearing to display grief are cropping up more and more.
Like this clip of a dog desperately trying to revive its companion after it was struck by a truck.
Not much is known about the incident, though comments on YouTube suggest it occurred in Zhangzhou, China.
Wake up! The surviving dog frantically tries to rouse his companion
Other examples which have ignited debate over whether canines in particular are capable of feeling grief or loss include this footage of a dog gently burying a dead puppy.
The dog gently nudges dirt over the body of the dead puppy
While some dismiss such assumptions as humans simply anthropomorphizing the behaviour of animals, others believe beasts are very much able to feel grief.
Take the case of Ciccio, a 12-year-old German Shepherd who for many months continued to visit the church where his owner's funeral was held.
Ciccio at the altar of the church of Santa Maria Assunta in San Donaci, Puglia
Father Donato Panna said of the grieving hound's visits: "He's there every time I celebrate Mass and is very well behaved - he doesn't make a sound, I've not heard one bark from him in all the time he has been coming in.
Wolf-cross Wiley appeared to shudder and sob over the gravestone, as a hand reaches out to stroke and reassure him “we miss her too.”
San Francisco vet and animal behaviourist Dr Sophia Yin believes dogs experience basic emotions, including grief, just as humans do, HealthDay reports.