After 15 years of living with a part blue healer we had to put him down. He was diagnosed with bone cancer by two different veterinarians. I feel guilty after having him put down 2 day after the fact. I still expect to see him when I walk through the door or when I head outside he would be there. He was with us four months after his diagnosis and I tried hard to make it some of his best. In the end he has started losing the use of his rear leags and I knew the time had come but that didn't make it a bit easier to do.