The ferret is a domestic mammal of the type Mustela
putorius furo. Ferrets are sexually dimorphic predators
with males being substantially larger than females.
They typically have brown, black, white, or mixed
fur, have an average length of approximately 20
inches (51 cm) including a 5 inch (13 cm) tail,
weigh about 1.5-4 pounds (0.7-2 kg), and have a
natural lifespan of 7 to 10 years...