Yeah, sounds good.
I was just thinking...I once 'babysat' a pooch similiar to Zoe (she's a boxer right?) and I absolutely had to use a harness. Even then, this 'baby' was giving me a real run for my money.
Choker chain: did NOT work.
He just kept going til he choked himself and dragged me along. Poor guy.
You're smart. Took me learning the hard way to figure out about the harness!!