[Quadraphinic]

Make sure your vet has other small breeds as patients, and is very knowledgeable about Yorkies. Have your vet to all the prelim labs, to make sure there aren't any underlying issues that would make it unsafe for the spay, you can also ask about their anesthesia procedure, some vets tend to be a little heavy in that area. Gina was 6 months, and we used the preemie onesies, backwards, and I just snapped one snap to the side of her tail. When she needed to go out I would unsnap the snap and pull the flap under and around side and re-snap, then I would wipe her with a baby wipe, and put the onesie back to the original position. She was a little groggy when she got home, but only for an hour or two. She ate her normal kibble, and wanted to run and jump that evening. Only problem we've had is her potty habits have reversed, now she scratches the door after she has already gone, still trying to break that one.
Cheers Quad & Gina