I like to work Jill's myself but everyone to there own, I start working them at 6 month but I use a experienced ferret with them to help them along, and as the season gets on I start putting them in bigger burrows, then by the end if the season they can work an average burrow by themselfs, then the next season they be ok to work all, it's best to keep ferrets in groups as they are very sociable little things, put stuff in there hutch for them to play on, mine like to climb alot, build a run off ya hutch but make sure it's got a good floor too( ie concrete floor)