I've got her medical records, a CD with her x-rays on it, and a bag of food properly labeled with her name & what type it is. I'm currently washing a blanket she likes, and if they have to throw it away afterwards that is perfectly fine with me. I'm also sending Vante with an extra "Happy Brush" in the hopes that somebody will brush her while she's there b/c I know she would truly enjoy that.
As a side note, one of my other cats, Amelia, just tested positive for hyperthyroidism last week. Since I'm trying to get away from pilling my cats twice a day, Amelia will be going in for I131 treatment in two weeks. They didn't have any more room to squeeze her in tomorrow.
For those folks who Googled this treatment and found Vante's Blog. I hope all this information helps you learn more about the procedure and decide if it is right for you and your kitty. If you have any questions, leave a note in the comments section and I'll do my best to answer them for you.
On April 11, 2013 this post was edited to correct a mistake. The radioactive iodine treatment is called I131, not R131. Thanks Billi for catching my mistake!