As Bruiser, Pickles needs to do a lot of sitting plus bark on cue so McDonald has also been working with the relevant actors.
"He's a real people pleaser, he'd do anything to make people happy and get treats."
The other dog in Legally Blonde is Rufus and he's played by Ollie Perry, Pickles' best friend.
"They're always hanging out and doing shady things."
They share a dressing room at the Wallace Development Company Theatre. Pickles is familiar with the theatre as McDonald is a performer and on the Act Three board.
However, the cast - except those he interacts with - know they are not allowed to pat Pickles so he can focus on his training. After closing night, there will no doubt be many pats and hugs.
McDonald has picked up his training skills from books and watching videos. He uses a clicker to signal when Pickles has done something right then gives him a treat. Tu Meke Friend has provided dog treats for the production, all stacked in Pickles' dressing room.
As for the mini dachshund's name, McDonald says he loves pickles.
"I'm known to eat a pickle or two."
Pickles' understudy is Ruby Jarrett while Jessie Feyen plays Elle, Lindsay Yeo Emmett, and Tyler Purdy plays Warner.
Based on the 2001 movie starring Reese Witherspoon, Luke Wilson and Selma Blair, Legally Blonde The Musical follows the transformation of law student Elle as she tackles stereotypes and scandal in pursuit of her dreams.
The Details
What: Legally Blonde The Musical
When: November 26 to December 11
Where: Wallace Development Company Theatre
Tickets: actthree.co.nz or ring 355 0499