MA, I'm glad to hear Harley is handling his treatment well. I completely agree, it is worth every penny, even if it is only for a short extension of life. I would have payed anything.
Jeannie, yes, my baby (Trixie) had to be put down. I couldn't do it when the doctor diagnosed her, she didn't seem that bad. But then later that day, she got horribly worse, and since there was no way to help, I had to take her back to the vet and end her suffering. What she had sounds like the same that Harley did, they found a large growth in her belly. But the x-ray also showed multiple smaller growths througout her body. And she has always been such a skinny cat that loosing a single pound was just too much to loose. (She varied between 5 to 7 lbs when healthy and she was down to 4 lbs.) I did see the strange hair a month earlier or at least 3 weeks earlier but I thought she just needed a bath. Since it progressed so fast I don't think she would have had a chance anyway. I should have seen something much sooner than that. But no matter how much I try to think back I don't think there were any signs I could have seen, so I guess it was just her time. I now worry endlessly about my other two cats, one of which is slightly older than Trixie and his fur isn't as nice as the young ones. I don't know if I should have him x-rayed just in case, or if it's natural for their fur to start to separate as they age. He is 13 or 14 years old.
Good luck to Harley, hope everything is going well!!!