Explanation of facts: *Became lame shortly after both moved to West Virginia --Important due to possibility of trauma during the trailer ride from Ohio to W. VA *Lame for past 2 weeks --Lameness seems to be static, not progressive, but is longer lasting than mild trauma/bruising to area *Presently foal is 7 weeks old --Age of foal is important when considering it social place within the herd and whether trauma was incurred by another horse kicking, fighting, etc. --The young age of the foal make congenital defects feasible, although unlikely with these clinical signs and the nature of their onset *Owner complains that the foal lays down a lot, can get up but doesnÕt use limb much --foal may be painful on the right front limb and subsequently prefers lying down to standing. *One of 7 horses in herd --important for ruling out trauma to foal from other horses within the herd. The 7 week old colt is one of the youngest within the herd and would therefore be one of the lowest in the social hierarchy. This increases the likelihood that he was involved in a traumatic event with another horse within the herd. *Since the injury the owner separated the mare and foal from the rest of the herd --The owner feels strongly that interaction with other horses was the cause of the present lameness *Right front limb lamenessÑdrags it and has problems extending it --Indicates possible radial nerve deficit. Damage to the radial nerve affects extension of the carpus and digits. The actual location of the nerve damage will determine if the foal can bear weight on the limb. With radial nerve damage distal to the midshaft of the humerus the horse would likely drag the dorsal aspect of the hoof but would be able to flip the hoof into position and bear weight. If damage is proximal to the midshaft of the humerus weight bearing will likely not occur --These clinical signs also indicate possible involvement of the extensor tendons *Atrophy of the shoulder muscles --Indicates disuse of the limb and the muscles supporting it. The cause for this may be neurological, mechanical, or pain. Any of these can cause decreased range of motion of the limb and therefore lead to decreased use and decreased muscle mass. The fact that atrophy has occurred supports at least a 2 week duration of lameness. *Treatment with penicillinÑ2mLs SID, 3 days --Owner may have felt that the lameness had an infectious cause. The present dose would not be sufficient and should be increased if evidence of septic arthritis, etc. is found. *Swollen elbow --suggests location of lameness *Normal temperature and respiration --suggests problem is not systemic or infectious *No crepitance or instability within joint --suggests absence of complete or comminuted fractures or rupture of joint capsule.