Cruciate ligament injuries remain a very common cause of injury in dogs, particularly in larger breed dogs. The current evidence suggests that degeneration occurs within the ligament rather than an acute trauma causing the rupture. An increasing amount of cases are presented with chronic hindlimb lameness over a number of months which doesn’t resolve. Many of these can be partial tears of the cruciate ligament which untreated usually go on to completely rupture. We treat cruciate ligament injuries with either a Tibial Tu berosity Advancement (TTA) , or a Tibial Plateau Levelling Osteotomy (TPLO) dependent on the specifics of the case. Results with both techniques are good, and we would expect that most patients should go back to a full and active life once they have completed their recovery. It is quite common to see injuries in both stifles, and it is very important that weight is controlled during recovery in order to reduce to a minimum the chances of the same injury on the other leg. It is also very important to have a controlled return to exercise and assistance from a registered physiotherapist is highly beneficial.