Thanks again everyone for all the information! I'm really impressed. You know more than every salesman I've ever talked to about the car.
I've come up with a list of solutions to my situation of the back being too small for my dog and thought I'd share them with you:
Plan A: Dealer swaps for mini-spare
Plan B: Swap with someone on Focus Finatics forum
Plan C: Buy a mini spare (only if the price is reasonable--- anyone know???)
Plan D: Drive around the South Bay (to/from work, mall, ect) with no spare, knowing if I wound up on the side of the road and needed it, Husband or Sister could bring me the spare. Put the spare in the car for longer trips (Russian River/So Cal) and have the dog crate sit on the folded down seats and put the luggage in the “too tall for the dog crate” back area.
Now if I could only get my dealership to call me back. Long story short, I bought this car of Sunday (signed all paperwork) and they told it would be here on Friday at the latest. Well, here we are on Friday and nobody (salesman or manger) will return my call!!! SO FRUSTRATED!!! They took my trade-in and gave me a loaner Mustang to drive around.