A question about dogs with the adventurous trait.

I believe the independent trait for dogs works the same as the free-spirit for cats.

My adventurous dog will only "adventure" when a sim goes with them and you get all the windows and read how their adventure went. The independent trait gives you the option to let them out and they can go and do as they please, coming back with little purple boxes or potentially with a bf/gf and some babies in the belly