In my 30+ years of having dogs I have had 4 females and have gone to two separate vets because of where we were living at the different times. Both vets encouraged us to spay before the first heat. I am just curious as to why your vet wanted to wait. Maybe you could ask him/her when you take Sylvia in just to satisfy our curiosity. I am glad you are taking Sylvia sooner rather than later. We will be thinking of your little sweetie on the 2nd!