Silver

This coat color has a number of variations ranging from light silver to almost gray. Many silvers will eventually lose all of their silver markings and end up as Dark-eyed Whites. The guard hairs can be silver, dark gray, and white. Some silvers have a definite pattern of silver hairs all over their body, while others will only have some silver rings around their tail. Silvers generally lack a full mask, instead having smudges of silver color around their eyes, which are dark brown or black. Their noses can be pink, black, or patchy. They are often referred to as black roans. ref: Drs Foster and Smith. Ferrets are crepuscular, which means they spend 14–18 hours a day asleep and are most active around the hours of dawn and dusk. Unlike their polecat ancestors, which are solitary animals, most ferrets will live happily in social groups. A group of ferrets is commonly referred to as a "businessWhen excited, they may perform a routine commonly referred to as the weasel war dance, characterized by a frenzied series of sideways hops and bumping into things. Despite its zeal, this is not aggressive but is a joyful invitation to play. It is often accompanied by a soft clucking noise, commonly referred to as dooking. When agitated or upset, on the other hand, ferrets will make a distinct hissing noise. http://en.wikipedia.org/wiki/Ferret