Having spent years observing their off leash behavior, I would like to share the Trio's off leash "decision tree" when they happen upon a new smell.
Step one: Identify new smell
Decide: Is this a really raunchy smell?
--> if NO - sniff lightly and return to mom.
---> if YES, proceed with decision tree
Decide: Can I eat it?
---> if YES, eat it and return to mom looking smug and enjoying the horrified look on her face.
---> if NO, proceed with decision tree
Decide: Is this something stinky enough to roll in?
---> if YES, roll for as long as you can. Ignore your mom's calls. You're rolling; it's heaven - who needs her? When you're finally done rolling (and not a moment before) - return to your mom.
---> if NO, pee on it and return to mom
Now that you're back with mom, begin to look for something else to sniff.
Repeat decision process as necessary.