Lori,
My BIL & SIL's lab had that surgery a few months ago and did great! For therapy, they let her swim in the pool after she had healed a bit and she's practically back to her normal self.
She still limps slightly after she's laid on that side for a while, but othewise you would never know anything had been wrong with her.
Your Amy is in our prayers. We love Goldens too
Tammy