The mice known as fancy mice are the same as
a feeder mouse. They and are domestic and marketed as either
depending on the seller. The term fancy mouse is used mostly to
describe mice that have been selectively bred for exhibition.
They can vary in size a lot, from small pet mice that measure
around 15 to 17.5 cm long from nose to tail tip, to show mice
that measure 30 cm from nose to tail. Pet mice weigh about 30 to
45 grams but large show mice can weigh up to 130 grams.
Fancy mice breeders direct the mouse’s breeding to create fancy
colours and patterns. These include black, chocolate, blue,
cream, lilac, red, fawn, white, cinnamon, golden agouti, silver
agouti, champagne, silver and dove.