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Eighty‐five dogs were diagnosed as having rupture of the cranial cruciate ligament. They were managed by restriction of activity to leash walks for 3 to 6 weeks, weight loss if indicated, and analgesic medication as needed. Twenty‐four of 28 dogs that had a body weight of 15 kg or less (85.7%) were considered to be clinically normal (no lameness and normal range of motion in stifle, 21 dogs) or improved (3 dogs) after an average follow‐up period of 36.6 months. Lameness in the remaining four dogs persisted or worsened over an average period of 8.2 months (minimum 6 months), and surgical replacement of the cruciate ligament was performed. Eleven of 57 dogs that had a body weight of 15 kg or greater (19.3%) were classified as normal (4 dogs) or improved (7 dogs) after an average follow‐up period of 49.1 months. Lameness in the remaining 46 dogs persisted or worsened over an average period of 10.2 months (minimum 6 months), and surgical replacement of the cruciate ligament was performed.
P Vasseur (Mon,) studied this question.