5 days ago, our 6 month old shih-poo had surgery to remove 17 teeth in
her mouth. Included in the 17 teeth removed were baby teeth that had
not yet fallen out, some adult teeth to reduce crowding, and 2 deformed
molars on the lower jaw.

After 3 days of recovery and seemingly doing a lot better, our puppy
has now started drooling excessively, it seems, mostly while she is
sleeping.

Her entire face and neck are drenched after an hour or two.

Last evening (after a full day of excessive drooling), she vomitted.

Why is she drooling so much? Can surgery to remove teeth cause this?
Or, could this be some kind of poisoning?

Thank you for any help.
Fette