Hypothesis 1-Trauma Dog fell off bed suggests an unresolved injury to the limb/joint. No radiographs from past to check for old/healing previous injury. Possbility that dog injured or reinjured limb while playing with other dog in house as owner not there 100% time. Negative cranial drawer suggests that cruciate may be ok. No response to antiinflammatory may lead to etiologyÉ.although without knowledge of previous dose may have just been dosing error. Age of dog with lameness not progressing-probably not degenerative joint disease.