Filou needs it every 1,5 years, Tigris all 2-3. Filou had it 3 times now - we didn't notice it until he lost a tooth. It is a short anesthesy and although my heart breaks every time it never was a problem. His breath is MUCH better afterwards and we simply have to go before his gingiva begins to bleed

My human dentist says it is the same with all animals: some produce more tartar than others. And if it is not treated they can be in pain and/or lose teeth.

So I am convinced Bonnie will be fine.

There is only one thing that could be dangerous: if she has a heart condition. If you want to exclude all risks you might check that first.