'Running on' is a term used by fanciers (exhibitors), meaning the babies selected as having possible show or breeding potential. They will be kept for an undetermined amount of time in order to assess how they mature. The period of time is different not only from breed to breed but line to line.
Babies in the nest, watch this space!
Rew doe out of BB's Lily a chocolate self and Guildor 2 a chocolate orange.