Normal wound healing Post TPLO Side view of incision with mild bruising and no drainage (72 hours). Here is post operative picture at 72 hours that is healing well. Moderate but extensive bruising and swelling is experienced by some dogs. No drainage noted. This is a variation of normal. This dog is at 72 hours. No additional action necessary. Normal swelling that occurs in hocks (ankles) after surgery. This is day 3 for this dog who had bilateral knee surgery. Front view of swelling of ankles 3 days post operative. No drainage and all sutures intact. Both knees had surgery.