Rex Breed Standard

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Standard of points

Updated 1st January 2024

Head, Eyes & Ears Head to be of good size, bold and broad, with a gently curving profile. 20
Muzzle to be of good width and gently rounded at the nostrils.
Eyes to be large, bright and bold and set with good width between.
Ears to be large and drooping, with lower rim parallel to the ground & set with good width between.
Body Shape To have short, cobby body; thick-set, with good width across shoulders. 15
To be fit and of good substance, with plenty of firm flesh covering shoulders.
To have good size appropriate to age.
Coat Appearance To have a crimped, erect coat appearing dense and even all over the body, with no areas of flatness or with coat tending to lie down. 20
Guard hairs to be removed. Belly to be well covered.
Coat length to be no more than 1.2 cm (0.5 inches) in length, preferably shorter.
Coat Feel 45
of which
Density To have thick, dense coat all over the body. (15)
Springiness To be springy and resilient when brushed with the palm of the hand, readily returning to the original erect appearance. (15)
Texture To be coarse to the touch, particularly on the top of the back, (15)
with allowance for a slightly less coarse feel to sides.
To be clean and free from grease.

Description of colours

The following notes define the main colour groups and give guidance on the correct classes to enter when exhibiting:


The cavy must be totally of one colour. Any coloured hairs visible on the surface of the coat mean that it should be shown as Any Other Colour (AOC).
A solid Rex which darkens at its points with age should continue to be shown as a Solid Colour throughout its show career.
White Rex that show colouring of hair on nose and feet similar to the Points on a Himalayan should be shown as AOC.


The cavy must be totally Agouti, although normal Agouti belly colour is allowed.
Cavies showing faults that occur in smooth Agoutis, such as eye circles, lightness on chest, solid feet or belly colour extending onto legs or body are still Agoutis.
Any patches of colour, no matter how small, mean that a cavy cannot be shown in this class.

Bi-Colour or Agouti Bi-Colour

A cavy that has solid patches of two colours or agouti and another colour.
Both colours should be clearly visible without disturbance of the coat.

Tri-Colour or Agouti Tri-Colour

A cavy that has a combination of white and any two other solid colours or of white, agouti and another solid colour.
All colours should be clearly visible without disturbance of the coat.


A cavy having roan colouration on any part of its body.


Any other Rex cavy that does not fall in the above categories. This includes Rex versions of other marked varieties such as Himalayan, Tan, Fox or Dalmation.

Guidance notes

The Rex is a short-coated cavy with a rexoid coat that should appear crimped and erect from the body. The feel of the coat is particularly important, being dense and even all over the body but springy and resilient to the touch.

When the coat is brushed forward, there should be no tendency for it to lie in that direction. Instead it should return to its original erect appearance.

Colour and Coat markings are used only to divide Rex classes at shows. No points are awarded for Colour or Coat markings.

Whilst the preference is for a curly or wavy belly, a straight one should not be unduly penalised.

Allowance should be made for the fact that younger exhibits will generally have a softer coat.

Specific disqualifications

  • Rosettes, partial rosettes

Specific faults

  • Extreme tendency for parting in centre of back
  • Coat length over 1.2cm (half an inch)
  • Soft coat on top of body
  • Flatness anywhere on body
  • Presence of guard hairs

Wash 2: Designed by Simon Neesam for the British Cavy Council © 2020