Wiley the wolf-dog was so loyal to his late owner, Gladys, that he found it difficult to accept her death.

The bereaved dog may be seen in a tragic video wailing uncontrollably at Gladys’ funeral while laying quietly on her tombstone.

Wiley is seen sobbing and shivering as family members gather around him in the video, which has moved hundreds of people.

In one film, a family member is seen reaching out to soothe a sobbing Wiley and saying, “We miss her too.”

Since it was posted on YouTube by user SarahandtheWolves, the video has had over 9,174,611 views.

Wiley is one of the military wolf-dogs that rehabilitate veterans suffering from Post Traumatic Stress Disorder when they return from combat, according to the YouTube account SarahandtheWolves.

The military wolf-dogs give rehabilitation and care to veterans through LARC, the Lockwood Animal Rescue Centre, which specializes in wolf-dog and horse care.

The user also supplied an explanation to allay any fears about Wiley’s health.

“I’m not a vet, so I can’t say if he’s reverse sneezing like some of you,” SarahandtheWolves explained.

“I can assure you that he has never done anything like it before or since.” I may be romanticizing his behavior, but this is how I cope with loss…”

“I also tell people who believe he’s dying that he’s not.” The sanctuary’s veterinarian, Wiley, is amazing.”

Click here to see the horrible video.