russell breed small white original 18th century breed named person credited creation type dog reverend john jack russell recognised variety jack russell recognised united_kingdom america recognised jack russell changed current form international clubs recognised new white breed smooth rough broken coat narrower range sizes energetic suited sports able children animals range breed related health issues mainly relating eye disorders history breed shares common history jack russell early 1980s type small white dates work reverend born purchased small white tan female named hamlet formed basis breeding program 1850s dogs recognised distinct type devon founded created breed standard type club formed aim promoting digging fox hunting turn 20th century associated type devon renamed jack russell club continued world war club folded jack russell club great_britain established parent club jack russell club actively opposed recognition jack russell club reformed aim seeking recognition breed initial application turned jack recognised january variant following suit recognised breed effective november august successfully petitioned change breed russell breed club following suit international association recognised russell june updated recognised breed april adopted new april new_zealand major clubs recognise russell separately parsons registered compared description russell bred conform standard unlike close relative noticeably longer legs tall length body predominantly white breed black tan markings easy groom coat smooth broken similar smooth coat longer hair head face legs body breed standard recognise rough coat clear outline hint beard dog broken coated possess moderately thick small shaped drop ears tip pointed eyes nose dog black normal range sizes inches tall weight pounds relatively square outline body long dog tall compared jack russell longer head larger chest overall slightly larger body size retains flat skull elongated shape lower set ears addition greater variation size ranging inches height hands able span chest dog required judging judge lifting dog legs gently ground motion order measure size chest judges fingers meet chest spine describes significant factor critical judging process measure size chest feel correct shape standard physical points treated faults ring height dog outside standard range dog possess ears liver brown coloured nose markings temperament energetic type dog sports agility require vigorous exercise order prevent bored potentially destructive home suited live children typical temperament tolerate rough handling describes single minded courageous work home playful unusual dogs breed involved work fox hunting typical small white adapted bench playful dogs horses breed standard requires treated fault states confused treated overt aggression dog accepted criterion disqualification ring health eye conditions affect russell include primary lens condition disease causes abnormal begin affected dogs support lens eye destruction cause lens fall wrong location eye lens falls anterior chamber secondary occur causing loss vision national associations publish dna screening results broken groups carriers eye conditions appear breed include juveniles progressive posterior detachment non eye breed related conditions affect average lifespan years
Parson Russell Terrier