The skin can sometimes show a pattern of small black or brown spots, referred to as 'ticking' that do not carry through to the outer coat. The Russell terrier, which is also sometimes called the English Jack Russell terrier or the Short Jack Russell terrier is a generally smaller related breed. Although sometimes called the English or Irish Jack Russell terrier, this is not the recognised height of Jack Russells in the United Kingdom. According to the Jack Russell Club of Great Britain's breed standard, it is the same size as the standard for Jack Russells in the United States, 25–38 cm (10–15 in). Compared to the Parson, the Russell terrier should always be longer than tall at the withers, whereas the Parson's points should be of equal distance.
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