Update - Day 9 of the tear Lucy is getting around better every day. We have not given her any pain medication now in at least two days. Read some interesting information that said the pain (as long as it isn't severe) is actually "good" for your pet.
So our little Lucy tore her cruciate ligament two days ago. Took her to the doctor yesterday and they recommended surgery but we aren't 100% sure that is the way to go. In doing some research it appears that the long term benefits of surgery vs. natural healing are about the same.