User blog comment:KorenaRena/Quick Question From a Newbie..../@comment-25274664-20140807014005/@comment-1342581-20140809115010

You can't reinforce behaviours in that version, instead just constantly do activities that make sense for the trait.

E.G Piggy= Peeing indoors Neat= Peeing outside Destructive = Eating furniture

Do so constantly and after ages you'll earn the trait