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1、貓和狗（Catsanddogs）Weusuallygivecatsasimpleclassificationmethod,atotalofthreespecies,accordingtothecat'slivingenvironment,cultivationmethods,andbyMaoChangduanthreepoints.Catclassificationmethod:accordingtothelivingenvironmentcanbedividedintoAcatthatisdomesticatedbyhumansbutdoesnotrelytoomuchonhumans
2、andretainstheinstincttoliveindependently.Wildcats:theancestorsofthecatfamily,originallylivinginthedesert,mountainforestandotheroutdoorenvironment,thecatappearedinhistory,asearlyastwelvemillionyearsago.Catclassificationmethodtwo:accordingtobreedcanbedividedintoPurebredcat:aspeciesofcatthathasbeenc
3、arefullycultivatedbygenerationsforanumberofyearsandgenerations,andstrictlycontrolsitsbreedingprocedurestoavoiddegeneration.Thesecatsaregeneticallystable,andcatshavesimilarcharacteristicstotheirparentsandcats,andeachcathaspedigreerecords,includingsex,species,bodytraits,andancestry.Hybridcat:abreed
4、thatisnotcontrolledbyhumansandbredonitsown.Thecatsaregeneticallyunstableandoftenhavedifferenthaircolorinthesamelitter.Catclassificationmethodthree:accordingtothelengthofhaircanbedividedintoCat:suchasMaine,Himalaya,thecatcatcat,PersiancatandcatMarleycableetc..Cat:Siamcat,AmericanShorthair,Japanese
5、bobtail,RussianBlueCat,exoticShorthair,AbyssiniancatandScotlandcatearcollapseetc..First,dogsaredividedintoseveralcategories,andstandardsvaryfromcountrytocountry.I'llusetheBritishstandardhere.Dogsaredividedintoworkingdogs,ornamentaldogs,singlehounds,hounds,shepherds,andmoredogs.Catclassification,c
6、urrentlypopular,therearefourkindsofdivision:1,Westernvarietiesandexoticvarieties.Awidelyusedmethodoforigininthewest.2purebredcatsandhybridcats.Classificationaccordingtobreedcultivationangle.3.Domesticcatsandwildcats.Accordingtothelivingenvironment,however,thereisnostrictlinebetweenthem.4.Longhair
7、edcatsandshorthairedcats.Accordingtothelengthofhairtotheclassification,forexample,Persiancat,felisHimalayalonghair;Thailandcat,Russianbluecatiscat.Therearedifferentclassificationsofdogsallovertheworld,andtheAmericancla
