Learning Issues 1. What are the major disorders of the stifle joint? 2. What are the musculoskeletal disorders the Lab breed is predisposed to? 3. What systemic diseases could cause/contribute to joint effusion and lameness? 4. What is significance of stiffness observed in hock joints on ambulation? 5. What are the range of values of cranial drawer that could be considered normal? 6. What besides collateral ligament rupture could cause medial instability of the stifle joint (and cause the observed valgus angulation of the left hind limb)?