Isabella's Mommy,
A few years ago I came here asking for Prayers for my little girl for the same surgery. She had her teeth removed due to decay and also spayed. She recovered wonderfully. We feed her Royal Canin for Yorkies, so it was already small and she adapted real well. Plus, her other foods she gets cut up small anyway.
Her mouth will be tender, but your baby will do just fine!
Matthias