Types and market classes of live stock . uttresses themselves sofar apart as not to press against the frog. A hoof cannot beconsidered healthy if it presents reddish, discolored horn, cracksin the wall, bars, or frog, thrush of the frog, contraction or dis-placement of the heels. The lateral cartilages should yieldreadily to finger pressure. Some horsemen object to a whitehoof, believing it to be less durable, but a white hoof is as goodas a dark-colored one. Horn of good quality is fine grainedand tough, while poor horn is coarse grained and either toomellow and friable or hard and brittle. C
Types and market classes of live stock . uttresses themselves sofar apart as not to press against the frog. A hoof cannot beconsidered healthy if it presents reddish, discolored horn, cracksin the wall, bars, or frog, thrush of the frog, contraction or dis-placement of the heels. The lateral cartilages should yieldreadily to finger pressure. Some horsemen object to a whitehoof, believing it to be less durable, but a white hoof is as goodas a dark-colored one. Horn of good quality is fine grainedand tough, while poor horn is coarse grained and either toomellow and friable or hard and brittle. CHAPTER XXVIII. SOME IMPORTANT FACTS CONCERNING THE HORSE. Base of support.—The horses legs are his base of support,just as the table legs support the table. The longer the legs,the less stable the base of support. The smaller the base ofsupport, the less stable it will be. The less stable the base ofsupport, the greater the speed of the horse; while the greaterthe stability, the greater the power for draft. The base of V«l^ebral spme. ?&hort pastern Fig. 117. Attachment of Fore Leg to Body. Cross-section through chest, showing the bones of the fore leg and themuscular attachment of leg to body. support of any object will be most stable when it comes directlybeneath the center of weight. In horses the center of weightis far forward, lying immediately behind the shoulders. Thusthe fore legs support much more of the weight of the horse thando the hind legs, in fact it is the function of the forequarters tosupport, and of the hindquarters to propel. This is the moreclearly shown when we examine the anatomy of the horse, forwe find that the hind legs are attached to the trunk by the strongball-and-socket joint, while the fore legs are not directly attached 361 362 Types and Market Classes of Live Stock to the trunk but are connected by intervening muscles whichform a sort of sling which suspends the body between the twofore legs. The muscle attaching the fore limb to the trunk is
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