. Judging farm animals . Livestock. 200 JUDGING FARM ANIMALS respiration becomes very difScult. The horse inhales na- turally but has difficulty in exhaling. '' This,'' writes Had- ley/ "requires the patient to make a special effort to force out the air. As a result, there occurs a 'double pumping action' of the flanks with two expulsive efforts instead of one. This produces the so-called ' heave-line' seen along the flanks of affected horses. Disguised cases can be detected, or tests can be carried out by feeding all the dusty hay the horse will eat, then giving plenty of water and drivi
. Judging farm animals . Livestock. 200 JUDGING FARM ANIMALS respiration becomes very difScult. The horse inhales na- turally but has difficulty in exhaling. '' This,'' writes Had- ley/ "requires the patient to make a special effort to force out the air. As a result, there occurs a 'double pumping action' of the flanks with two expulsive efforts instead of one. This produces the so-called ' heave-line' seen along the flanks of affected horses. Disguised cases can be detected, or tests can be carried out by feeding all the dusty hay the horse will eat, then giving plenty of water and driving him briskly.'' Roaring' is a disease in which the horse breathes noisily. The larynx is affected, but not the lungs. This is a paralysis of the nerves and muscles of the parts, which results in a whistle-like noise or roar when inhal- ing. Roaring is manifested during ex- ertion, yet a horse may be a roarer and be driven some distance without becom- ing especially noisy. The disease is he- reditary, and animals suffering from it should be disqualified for breeding pur- poses. This malady may be cured in a large per cent of cases by surgical operation. Bone spavin, often referred to as spavin, is found on the inner side and front of the hock joint. The spavin usually occurs on the lower part of the joint, and when especially low down it is known as a "low or jack ; The joint surfaces may also become enlarged, forming a "blind spavin," showing no enlargement, but accom- panied by severe lameness. Spavin is caused by a strain or injury and con- sists of accumulations of bony matter at the joint. This is usually shown. Fig. 111.—' 'Bone spavin is found on thie inner side and front of tlie hocli ; (Plioto by courtesy College Veterinary Medicine, Ohio State University.) 'The Horse in Health and Disease. F. B. Hadley, Philadelphia, Please note that these images are extracted from scanned page images that may have been digitally enhance
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