Here's some ideas for you;
1) Oh Cutty! You Lucky Pup, we are going to a doggie resort and you are going to have an FABULOUS rest and rejuvenation treatment!
2) Yay! We get to go visit Dr. Kneebone and you LOVE the nurses there and all the attention! You are getting a NEW KNEE! Better than any toy anywhere!
3) Mama gets some one on one time to bond with Miila while you relax and enjoy the attention and rest and your brand new knee from the seasoned, trusted professionals!
I know it's hard. I do. I really do. But Try though, ok? I'm telling you, it will make a difference. Positive intent is everything. Picture the perfect dr. visit while you are going there.....and then make it happen. You can do it!