I've started training a Wolf for the Wolves Of The Steppes fraction, and after the last quest I did, my cub got upgraded to an adolescent.
But now I can't find any more quests to progres further. Can anyone lend me their insight on this?
Yep. You have to rank up to 3 (I think) to get your wolf to full maturity.
Enjoy those quests mate, imo much better ones than for tiger.
However do not expect this wolf to be viable combat pet (very low damage, Cappa's buff is much better) so I hope you have mount in mind.