Squirt was about 15 when I stopped her treatment as well...and many other meds she had been on. I promised her no more pokes, prods, or scary rides unless absolutely necessary for the remainder of her days. It was the right decision for her and I trust you know this is the right decision for your sweet girl, too. Squirt was happier and lighter in spirit....I hope Rosie finds the same.
It is so good to hear from you and I hope you and Rosie have many more memories to create ahead of you. Let us hear from you when you can!
Hugs,
Leslie