The Fédération Cynologique Internationale standard for the Jack Russell terrier has this smaller size listed as a requirement. Terrierman Eddie Chapman, who has hunted in Devon for more than 30 years, the same area that John Russell himself hunted, notes that, 'I can state categorically that if given the choice, ninety-nine percent of hunt terrier men would buy an under 12 in (30 cm) worker, if it was available, over a 14 in (36 cm) one.'
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