Jack Russell Terrier　AUST スタンダ−ド解説e

COLOUR

White MUST predominate with black, tan or brown markings.

White MUST predominate which is more than 51%. The word predominate clearly means overwhelm not as some imagine a marginal percentage. White and tan are the most often seen, but the Tri colours (black, tan and white) are starting to emerge again after being rare in the early 1990s. They have always been part of the Jack Russell breed. The white, black tan and brown come in many patterns and varying mixes of individual hairs, regardless of the shade, dogs are classed as plain tan/white or tri.



Speckles or ticking are sometimes found. This is not a fault as such but is not encouraged. The same applies to Fox Terrier. All white dogs are quite correct if the nose, eye rims and lips are pigmented black.

Please Note : The under belly of a Jack Russell Terrier DOES NOT COUNT WHEN DECIDING ON " WHITE MUST PREDOMINATE." The Terrier will not rush out of a fox earth (den), stand on his hind legs to flash a white belly so the hounds will not attack him by mistake instead of the fox. Hence the importance of predominately white.




The colours of the Jack Russell

An article by Dr. Julie Tibrooke - DVM and Susan Hunt.


White the standard calls for white/tan and tri coloured, they can be broken down into mors precise combinations. They are, in rough order of occurence, as follows:

TAN/WHITE

These dogs are white with tan patches - tan may include all shades of tan from lemon through to chocolate. Ther is no sharp variation from one part of the body to another and the dog is the same shade all over (white the exception of normal pigmentation variations, ie, slight lightening over cheeks/eyebrows/forehace, darker hairs on ears etc. )

TAN/WHITE
(BLACK SHADING)

Tan/whites may inherit a separate gene from Black Face Markings. This may be a full black face mask, or a little black shading on the cheeks and/or around the eyes.


Tan/white dogs with black face markings are not tricolours - tricolours have lighter face markings (see below). All speckles on a tan/white dog will be tan.

TRICOLOUR

These dogs are white with black patches. The black patches are uniformly black, although occasionally may have a tan border or a tan undercoat, The body may have some all tan patches as well as black patches, but the head of the tricolour is basically black.



IN some black dogs the turns to tan as the dog ages, sometimes as early as puppyhood. These dogs are the tricolour more likely to have one or more tan body patches.



Tricolours have a separate gene for tan points on the face. This may be a full tan face mask or tan points on eyebrows, cheeks and on the undersides of the ears.

Speckles on a tricolour will often be tan where they appear on the legs, breaching or chest and black on the neck or body.

TAN/WHITE (BROWN)


In other breeds this colour is often called sable/white. A true tan/white(bruwn) is so dark in colour as to appear black and follows the same tan or lighter shadung pattems as found in r\tricolours.
Occasionally, the head is tan and the body patches near black. Usually the undercoat is tan, and the outercoat a mixture of black hairs interspersed with than.

SABLE is an even admixture of brown and black hair in no particular pattem, with lighter points as mentioned above.


The sabling of the tan/white (brown) is a colour found in the ancestors of the Jack Russell - the Fox Terrier and Parsons Terrier .
All Jacl Russells registered with the ANKC (bar those descending from recent imports and those transferred from the JRTCofA Inc, registered with a pedigree category of "100% imported bloodines) are known to trace to early Foxing Terrier and will carry the genetics of the common colours that appear in those breeds. I know of no　brindle Jack Russell in Australia.




White dogs are not seen in the show ring. Unlike Parsons Jack Russell Terrier exhibitors, a breed with very similar colour requirements to the Jack Russell Terrier. Breeders, judges and exhibitors show a distinct prejudice against all white animals. If pigment is present in eyes and lips, the dog is quite correct.