I would probably hold off on the ABs too. At least you have the script if you need it. With every tooth I cut, I got a raging ear infection.
So just keep going as you are! As for the thought of thrush, I don't think they get a red throat from it, just the white spots in the mouth. Getting either Daktarin or Nilstat drops wouldn't hurt, hope the nasties pack their bags and leave pronto for you guys
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