If there is swelling below the surgery site then I would massage the area with movements towards the stifle and hip.
We started underwater treadmill as soon as the suture (staples) were removed and continued at the rate of twice a week for 8 weeks. By that time she was able to do 2 miles on an incline.
We also did a lot of sits to stands early on along with side hill waking on leash and slow moving up stairs no bounding. There was a set of about 82 stairs with many landings and we would walk to each landing where she had to sit stand sit stand a few times. I iced after each walk or period of exercise.
I have found that most of the surgeons are more conservative than I was as they are afraid of problems occurring and that the owner will not recognize these and try to work through them.
You need to know your dog and look for anything that seems different or odd when doing rehab and stop and reassess frequently and cut back or rest if you feel that there is a problem.
Again good luck.