When Romeo joined the family, that all changed. Romeo is BIG into playing and will try to engage any dog in a romp or wrestle. He persistently worked on Gio and after a couple of months, finally got him playing along!
Here is a version of the game that they routinely enjoy. I call it "Sheltie Wars" because there is a lot of growling, posturing, and mouth wrestling ... they basically both look like savage beasts at times, but they love every minute of it!