=Prognosis.= The prognosis varies considerably, according to the extent to which deep-seated structures are involved, and the gravity of the lesions is usually proportioned to the intensity of the symptoms. =Treatment.= Frequent cold applications, cold foot baths for an hour or two night and morning, and even cold poultices are useful. When the pain has somewhat diminished, which usually occurs in from three to four days, vesicants may be employed, and, at a later stage, massage. Failing improvement by these methods, the injured region may be fired in points. Strain of the hind fetlock occurs under precisely similar conditions to those above described in the case of front limbs. STRAIN OF THE STIFLE JOINT. Strain of the stifle joint results from over-extension of ligaments without displacement of the patella, and also (and probably more frequently) from injuries to the aponeurosis and tendons of insertion of the abductor muscles of the femur and tibia. =Causation.= Strain of the stifle may follow violent collisions, such as occur in entering or leaving the stable, from falls on rough ground, from direct blows, from slips, etc., or even from the sudden and violent contraction of the muscles of the antero-external surface of the quarter. =Symptoms.= Lameness follows immediately or soon after the accident, and is of a peculiar character; to avoid using the injured joint, the animal advances the hind limb with a mowing movement. The injured region exhibits diffuse inflammatory swelling, which impedes palpation, and makes it difficult to determine the exact nature of the local lesion. The thigh at the stifle is painful. =Diagnosis and prognosis.= Diagnosis presents no considerable difficulty. The prognosis must be based on the intensity of the symptoms, and becomes grave if the tendons or aponeurotic insertions be injured, or extensive damage have been done to ligaments. =Treatment.= At first, continued cold applications, douches, and massage are most useful; blisters are more effective in the grave cases, and comprise not only the ordinary blisters, but the powerful mixed blister containing tartar emetic, powdered hellebore, bichromate of potash, etc. If for any special reason it is of importance to preserve the animal’s life, the parts may be fired; but for economic reasons it is usually better to fatten it for the butcher. STRAIN OF THE HOCK JOINT. =Causation.= Strain of the hock joint is commonest in young oxen which are being trained to work. Their hind quarters are necessarily more or less free, and the animals are apt to make side movements to avoid the goad, thus exposing the hock to irregular strain. The internal ligaments are more frequently strained than the external, a fact due to the conformation of the hocks.