That hurts just to think about. So sorry Chris....
We had a golden go due to cancer everywhere. We got back from a vacation and my friend who had been watching said she had been acting weird, almost being non-responsive. She wouldn't even look at us, she just stared blankly at the ceiling. The cancer was in her bones, in her stomach/intestines, and had spread to her brain. Occasionally she would stumble outside and lay in the grass, but she would be there for 5-6 hours before she could muster the strength to stand back up and struggle back to the garage. One day she couldn't stand back up. We had to pick her up to get her to the garage. She was put down the next morning. Hard moment, so I get that feeling in my stomach...