Roborovski are still having Mutations crop up, but so far the main mutations are as follows:
Agouti/Wild Type/Normal
Dominant Spot
Recessive Spotting
Husky
White Faced
Cinnamon/Rust
However, at one point in a group on facebook someone came across a pure black Roborovski in a pet store.
There are also combination mutations such as Pure White, Platinum, etc.
They are also still deciding on common names for some mutations like Cinnamon/Rust and gene codes are difficult to find and are varying.
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