Same animal now aged 2 years with her own Silver Grey calf. Six months old. One hour old. Seven months old. One month old. One hour old. A black calf stays Black! A Dark Grey calf turns dark chocolate with age. A Grey calf turns brown as it grows like this ones mother. A Light Grey calf turns pale dun/beige with age. A Silver Grey calf turns darker silver grey with age. A Silver calf, turns whiter with age.