We have each puppy from about 8 weeks to 18 months, though Anka is slightly older,about 13 weeks.
So, the dogs go through socialization with us for a year and a half, then have to pass an In for Training test to qualify for further training in harness. Then they're in harness training for another year, maybe slightly longer!
I hate being away at school while Mom's got a sweet puppy at home. :-(