Dog lame in right hind leg Small breed dog wht=11.6lb : small breed dogs are predisposed to certain conditions Fell off bed a year ago : possible traumatic event leading to injury Limp with wht bearing lameness (rt hind) : eliminates severe trauma leading to non-wht bearing lameness Clinically normal w/in month : original insult repaired Mild lameness recurred 6 mo later : probable secondary changes in jt Tx with antiinflammatory injection-no response : indicates severe pain or non inflammatory process Lameness hasn't progressed significantly Indoor dog Grade III/IV lameness on rt hind : intermittent non wht bearing lameness Medial buttressing on rt stifle : medial proliferative compensation for stifle stability Cranial drawer negative-pain noted : wasn't anesthetized so doesn't rule out cruciate rupture Patella easy luxated medially-pain noted : indicates laxity in stifle Pain response with lt hind limb palpatation : possibly bilateral problem