Miranda I'm so sorry you have to deal with this situation. Your buddy is beautiful. Her quivering may be due to pain. Has the vet prescribed any pain medication or steroids?

As far as the procedure if done properly there should be no pain. Does your dog typically struggle if restrained or held? If so I would suggest you request a sedative before the procedure to keep things calm. Talk to your vet about what to expect before, during and after the procedure.

My thoughts and prayers are with you during this difficult time.