Whether you’re an animal lover or not, this story will tug at your heart strings.

Robyn Arouty, a photographer from Houston, Texas, decided to capture her friend's dog’s last day on film. Duke was adopted three years before and had been suffering from a number of illnesses. After struggling with the decision, the family decided it was time to let Duke go.

The Roberts family had the appointment set for July 7 and decided to spoil Duke by feeding him hamburgers, taking him to the park and more.

You can check out the awesome pics of Duke's last day below, but we warn you: grab some tissues, because you will not get through the story without needing them.

Thank you to Robin Arouty for permission to use Duke's photos. You can see more of her work on her official Facebook page.

See more of Duke in his adoption video: