There are 2 varieties of ferrets, based on coloration.
Albino ferrets are white, with pink eyes.
Kits are born deaf, with their eyes closed. Their eyes open and they begin to hear between 3 and 5 weeks of age. Kits generally are weaned onto commercial kitten chow at around 8 weeks of age. Kits reach their adult weight at 4 months of age. Males are typically twice the size of females, but both sexes undergo periodic weight fluctuations.