This article is from the WSSF 2016 AFRMA Rat & Mouse Tales news-magazine.

By Karen Robbins

Tawny Glenn, Facebook
Q Is this a new kind of rat, new color, new marking, new coat??? I’m gonna say color or marking. This is not rusting as it comes in after first molt and never goes away. Its fully reproducible. Its been successfully produced over 8 generations and shows in every litter.

 
A These look like the Tortoiseshell that Robin MacDonald and others in the Midwest were working on a few years ago:

• Robin MacDonald’s page Tortishell Effect (bottom of page)
• and on A. Gangi site: Shadow, Midnight, Tortoiseshell
  Shadow, Midnight and Tortoise shell: Three New Varieties in the Domestic Rat.

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