Keros(VDM009) was born in the Drie Doring Mob on September 4, 1994. His mother was VDF001, the dominant female, and his father was an unknown male possiblely the dominant male of the Drie Doring at the time. His litter consisted of his two brothers Arah(VDM007) and VDM008. The three brothers survived their first year within the Drie Doring. As an adult male Keros started to take to roving shortly after his first birthday. In October 1995, barely a month after his first birthday, a group of wild males joined the Drie Doring and drove out all the natal-males over a year of age. Keros left the Drie Doring for good along with his brothers Arah and VDM008. The three brothers came across a lone female named Vivian and founded the Vivian Mob. Kero's brother VDM008 became the dominant male, howeve