My chi Koke has had both of her rear legs done. Not at the same time though! She wore a cast on each leg for about 2 weeks, that was enough to slow her down considerably. After the cast came off she was on pain meds for a couple of days, then she just couldn't go up and down stairs or jump. She has never been able to jump on the couch without using a step so I just removed the step for a couple of weeks and lifted her up and down.
You are right about it being for the good of the dog to get it done. She only holds her right leg up now when it's really cold outside, it was the worst one, the left leg she never holds up anymore. I do not regret having either operation done at all. It's a little tough at the time, but you have to remember it's only temperary. The end result is soooo worth it.
Sandy, Koke and Lelaska's Mom