Early in February, 2010 she made a major breakthrough in her fetching technique and brought back two Whirl Wheels, but has never been able to replicate this feat.
Just the other day, faced with a friendly rival swimming in the Darebin Creek, Penny did it again - this time with sticks.
And here's the proof.
You have to look carefully, but there she is, clearly, holding two sticks.
She made sure she kept her paw on the sticks so no-one could steal them.
(Yes,I can see there's an extra stick in the photo. I don't know where that one came from!)