Hypothesis 2 Fractured rt. Tibia and dislocation of left hip. Large amount of force suddenly applied to hind limbs cause bones to break or rearrange depending on the area absorbing the majority of the trauma. Definite palpable fracture tibia of rt. hind leg. Instability in area of midshaft. Dislocated left hip could cause crepitance when moved. Not able to localize problem. Could possibly cause swelling in upper leg and instability of upper leg. Large amount of swelling in left hind indicates inflammation somewhere, probably due to damage of some area of skeletal system. Probably something hurting/damaged in both hind legs since not able to get up with either legs.