My eyes watered up a bit watching Owen and Haachi. I understand the love of some dogs. I have a handicapped nephew who had dogs as companions throughout his 21 years. They knew he was handicapped, and even took abuse at times, but always forgiving.
My sister's first dog, a white German shepherd she had before Jack was born, loved her unconditionally. When Jack was two months old, he was seriously ill that led to his disabilities. He was edging on life and death for over three months. My sister stayed in Ann Arbor with him during that time, which began in February. The day before Good Friday, I picked her up to bring her home for the holiday. Another sister stayed with Jack.
As I was opening the door, the dog jumped over my head, knocking me down, and hugged Betty with all four paws. He wouldn't let go until her husband pried him off. When Jack got home, he was a constant companion, warning Betty when Jack needed her. He did that until he died.