A tear-jerking video of a cancer-stricken Labrador's final moments has left the internet in tears.

More than two million people have watched the viral video posted by owner @tailsofjoyco, who has owned Lily for seven years before she was diagnosed with lymphoma, one of the most common types of cancer diagnosed in dogs.

The final stages of Lily's life were filmed, involving snacks, cuddles, and lots of love before she was put to sleep.

The owner added the following text to the video, it said: "Mom: sorry baby girl but you have to go now. Thank you for everything, we're so grateful we had seven years with you. I love you forever and ever."

Canine lymphoma is similar to non-Hodgkin's lymphoma in people. It is so similar, in fact, that veterinarians and human doctors use almost the same chemotherapy protocols to treat lymphoma in their patients.

Scientifically speaking, lymphoma is a blanket term used by doctors to describe a group of cancers that stem from lymphocytes, a type of white blood cell that helps the immune system fight off infection.

They are highly concentrated in organs that play a role in the immune system, like the lymph nodes, the spleen, and bone marrow. While lymphoma can affect any organ in the body, these organs tend to be where most lymphoma cancers are found.

Dealing with the loss of a pet can be devastating as they essentially become a part of the family. Whether they pass away naturally or are put to sleep at the vets, it is always an upsetting time.

Purina, the pet food brand, has shared a few tips on how to cope with the loss of a pet.

Over 4,000 people have commented on the video to send their condolences.

One user wrote: "I'm so sorry!! I feel ur pain!! Don't worry!! She's resting in peace and watching you! Swindling loves and hugs!"

"I'm crying so hard thinking of the day my sweet girl will have to go. I'm so sorry," wrote another.

Another TikToker said: "So sorry for your loss, labradors are the best friends you could ever ask for. Never cried over a dog I didn't know before. Fly high beautiful pup."

Newsweek reached out to @tailsofjoyco for comment. We could not verify the details of the case.

Do you have 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.

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Owner Saying Goodbye to Labrador Leaves Internet in Tears: 'Have To Go Now' - Newsweek