We requested a flexion test with circular walk, but those tests were not performed 
because the tests are only performed to diagnose persistent problems, although TitanÕs 
lameness is intermittent Ð even if indicated, a negative result would have been 
inconclusive.
The lupus test we requested was not pursued because the disease should have been ruled 
out at the level of clinical signs.  
Palpation of the stifles with the dog under sedation revealed that the right stifle is the only 
one with patellar luxation.  The cranial drawer is still negative under sedation, 
eliminating a cranial cruciate ligament rupture as suggested in hypothesis 2.  The left 
hind limb seems normal Ð the pain responses noted while the animal was awake are gone.  
Possibly the patient was simply irritated after palpation of the luxating stifle.  Thus, the 
idea in hypothesis 2 of damage to the left stifle as a result of compensating for the right is 
no longer supported.  The fact that the dorsal flexion of the tail encited no response 
discredits our original thought that the problem could be more general, affecting other 
joints, as in hypothesis 3.
Hypothesis 3 is also disputed by the lack of radiographic evidence for arthritis.