Plan of action

Radiographs:
For hypothesis 1: Would expect to see decreased muscle mass of the right hip flexors as 
compared to the left hip flexors.   Would expect to see increased fluid density.

For hypothesis 2: Would expect to see increased fluid density due to joint swelling.  
Would also be looking for any fractures, bone chips.

Hypo 3: Would see a growth plate abnormality:  asymmetrical, longitudinal growth of the 
metaphysis or epiphysis.

Ultrasound:
For hypo2: Would look for tendon, ligament damage, swelling, and fiberdisruption.  Also 
look for increased swelling in joint and soft tissues.


Orthopedic exam: 
For hypo1: To see if there is hyperextension of the right fetlock joint, as compared to the 
left fetlock.  Wait two weeks and reobserve foal walking.  If the lameness is reduced or 
gone, it would support right hip flexor hypertrophy. 


Joint Fluid Aspirate:
For hypo 1: would not expect to see increased neutrophils and macrophages, no evidence 
of inflammation.  Not an exteme rise in neutrophils as found in septic joint infection.

For hypothesis 2: Would expect to see increased cellularity.  This includes increased 
Neutrophils and Macrophages.  

To rule out an infectious cause, look for the presence of bacteria, and degenerate 
neutrophils, with increased cellulartiy overall. 


CBC/profile:
For all 3 hypothesis would expect a stress leukogram.
Hypo 1: Would not expect to see an inflammatory leukogram.
Hypo 2: Would expect to have an inflammatory leukogram.
Hypo 3: In indication of an inflammatory response would support.