Several Months but. . . . .
It is a significant heal time, but our girl was pretty active within days. The important thing to remember is that there is no longer bone on bone contact to create pain, so as soon as they heal enough from the surgery that the incision isn't hurting, they tend to carry the leg and romp and jump around like normal. Our girl started trying to use the leg in days and within 3 to 4 months was as good as new. She was 3 1/2 yr old at surgery so that may have helped. We do not regret getting it done though.
"Dogs were put on Earth to demonstrate unconditional love, cats are here to teach us we aren't that **** important"