Gracie was spayed 2 weeks ago, and she didn't need a cone. She didn't bother her stitches at all. She was licking her leg where they had to shave her for the IV
but not her tummy. She also was only 'down' for about 2 days. Then it was back to business as usual.
slow down girl!
I'd give it a try and she if she'll bother the stitches. I'm betting she probably won't too much. And you can always do the onesies to keep her away from the stitches. I'm sure she'll be much happier in them then the cone.