one group was infected orally at one day of age and some birds developed bone and joint abnormalities but another group , infected via both the thoracic air sac and the foot pad , also at one day of age , developed a higher incidence of these , abnormalities , which included chondrodystrophy , rotated tibia , deviated toes and , in a few cases , erosion of the articular cartilage of the hock joint .
C0262950
bone
C0008449
chondrodystrophy