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LamenessinRacehorsesPaulREarlFacultaddeCienciasMillionsandmillionsofdollarsareinvolvedinhorselameness.Itiscausedmainlybyoverexerciseonhardsurfaces.Thefirstpointisthat70%ofhorsesondirttrackshavefrontcannonboneproblems,whereas4.1timesless(17%)onturftrackshave.Thecannonboneisthemainfusedlegbone.Thesecondpointisthatmaturityisreachedat4-5yearsofage,andyoungbonesaresoft.Thisisanappealforallracetrackstoswitchfromdirttograss.Racehorsesrunfartherastheygetolder,staringat¼or3/8thofamile(3furlongs)goingto2milesusually.Nonetheless,itisspeednotdistancethatcausesthedamage.Still,theownerofMano’Warat3yearsoldwinningthePreaknessat1¼andtheBelmontStakesat1½milesthoughttheKentukyDerbyata11/8mileswastoolongforhim!Thereismoretoitthanifstakewinnersonly.Someownersonlywanttowinstakeraces.Thenthosehorsesthatcannotreacha“GallantFox”triplecrownstandardwillbesoldorcrippledorboth.Themainsignoftroubleaheadisheatinthelegs.TheanatomyofthelegsSomeProblemswiththeHoovesSubsolarInfectionsarethecommonesthoofinfections,andcommoncausesofacutelameness.Apenetratingwoundinthesole,frogorwhitelinegenerallycausedbythehorsesteppingonasharpobjectlikeanailcausinglacerations.BruisedSolesareoneofthemostcommoncausesoflamenessinbothshodandunshodhorses.Injurytothesolemaycausedamagetothesensitivestructuresunderneathandresultsinbruising.Theresultcanbedamagetothemanytinybloodvesselsunderneaththesoleandconsequenthemorrhage.NormalandcontractedheelsSplintsthatwerepartsofthetoesmillionsofyearsagocanmakeahorsefrom2to3yearslame.Theligamentbetweeneachsidebone--splint--andthecannonbonefusepossiblycausingatemporarysoreness.Buckedshinsisaverycommonconditionpossiblycausedbymicrofracturesandthelikecausedinturnbyconcussionandstress.Thesurface,theperiosteum,mayseparatefromthefrontofthecannonboneintheprocessoflayingdownmorebone.Manytrainersforcethehorsetobuckasinevitable.Thisisdonebyfastworks,notgallopinglongdistances.Thisscaleis:walk,jogortrot,gallop,breeze,workorrace.DesmitisofSupportingLigamentslikethewithimparligamentandtheproximalsu
