I'm happy to see that you got an earlier vet appointment. It is also good that you know right from the start what would be best for Speckles, and you're absolutely right. It's better to have 1 good quality year than 3 or 4 unhappy ones.
I sure hope it is early enough to try complete treatment with a prescription diet. Be sure to ask about the Purina Veterinary Diet DM since it would be worth a shot. My vet said it was the newest and most cutting edge food for diabetic cats, so I've been crossing all of my fingers in hopes that it helps with our Socks and hopefully for you too! So far he hasn't had to go on the shots, and I hope it continues that way.
I'll say some prayers for you and Speckles and all fingers and paws will be crossed in hopes of a good food treatment for her! Let us know how the vet appt goes!
**hugs**
Karen