I'm sorry to hear that. We had a cancer scare with our 7 year old dachshund a few weeks ago. It turned out to be a combination of pancreatitis and diabetes instead. Not great but at least manageable.
I'm so sorry for your loss, BJ. It's a tough decision to make, and the right one in most circumstances.
So sorry for your loss, B.J. It was the right thing to do but it's still difficult to have a pet put to sleep. I've had to go through it several times and it never gets easier.