Explanation of Facts

3 YO spayed female pomeranian, 11.6 pounds:  This is an adult dog, therefore all growth plates are 
       closed

Indoor dog:   eliminates possibility of outdoor injury that was not witnessed by owner

Owners have another dog; the two play well together:  The two dogs actively play together, and 
        the injuries to the pomeranian are not suspected to be from the playing

Fed 1 small can dinner / day: Depending on type of food, this should be adequate, and should not 
        predispose the animal to obesity

Lame in Right hind leg

Fell off bed one year ago with weight - bearing lameness on RR leg:  Traumatic injury to RR leg; 
         injury from a fall could include a fracture (concussion), ligament rupture / tear, nerve damage, 
         joint capsule damage, muscle tear, or combination

Clinically normal one month post injury:  The healing 

6 months later started showing mild RR lameness

Rx: anti-inflammatory injection 7 months post _ injury; drug unknown, did not help

Lameness has not progressed severely over last 6 months

Vaccinated regularly, and on heartworm preventative

Dewormed 2 months ago

Occassional _allergies_, which causes seasonal sneezing

Rx: Benadryl PO when allergies act up; last administration 1 week ago

Grade 3/4 intermittent, non-weight bearing lameness on RR leg

Palpation of RR revealed that medial buttressing is possible on the stifle

Cranial drawer NEG

Patella easily luxated to medial side of trochlear groove with leg in extension

Patella returns to trochlear groove when stifle is in flexion

No abnormalities in hip joint, long bones, muscles, and other joints in leg

Palpation of LR leg revealed only pain (tried to bite) when cranial drawer and patella 
luxation attempted

Pain response elicited on dorsal flexion of tail

No pain on direct pressure to spine and lumbosacral joint