I think they go on sale at around 5-6 weeks old, Pretty damn small. They can be a bit nervous at first and you have to leave them in the cage for a couple of days to settle. after that you can start to handle them with care as they will be nervous and tend to run away. after a week or so they will be happy and won't leave your sight. they get used to your scent so introduce yourself slowly as to avoid the nipping and once they know you they should never bite you ever. Males are the lazy ones and will happily snooze on your lap etc but can be a bit messy when they mark their spot

, Females are squeaky clean stay quite small and are more hyper so will tend to run around more. I recommend 3 or 4, two is ok but they all have their own personality and are very social so prefer to have company