Coat types

Body types



Although not recognised as a variety in its own right for showing in the UK, masked is used as a term for a fairly common mismark that can be seen in litters when breeding for Black Eyed White or Capped rats.

Genetics: As for Capped (homozygous for notched or extreme Hooded locus – hnhn, hehe […]

American Irish

The standard for Irish rats in some US clubs probably most closely resembles the UK Berkshire variety, though it is more accepting of rats with less white on their underside. The lesser marked versions are often given the affectionate but descriptive nickname “belly Irish” or “tummy Irish” in the UK – it is not a […]

English Irish

AKA Irish

Russian Dove

AKA dove

Russian Pearl

The Pearl gene can be confusing genetically, since it only has an effect on Mink based rats (and even then, it’s not as predictable as you’d hope it would be). Therefore, the Russian pearl variety is also described as Dove Pearl or Russian Cinnamon Pearl, since it is a combination of Russian blue, Pearl, and […]

Lavender Agouti

Another variety that is not shown in the UK as it is too similar to other existing varieties, so the lack of selection means that this combination can be quite variable. Generally it will vary from looking like a slightly washed out Blue Agouti, to something resembling a Lilac Agouti but with a distinct blue […]


This is not a standardised variety in the UK, as it is not considered distinct enough from other existing varieties. A combination of Blue and Mink, the shade produced is very variable but in general resembles a Lilac with a distinct blue tinge.

Genetics: Non-Agouti with two copies of the English Mink gene and two […]

American Blue

AKA: Sky blue

Sky Blue

The Blue gene can give a whole range of colours, from a pale, powdery blue over a white undercoat to a deep, rich slate down to the skin. The UK standard asks for a deep steel blue, and that dark shade we refer to as “British Blue“.

Although the US standard also refers to the […]


AKA topaz