Thanks for posting that link, Eva.
It's a great place to find out what the reviews are on different kibble and canned food. Check it out! Please stay away, far away, from anything Iams! If you look that food up at the link Eva posted, you will understand.
You can keep feeding your new pup some of the food the breeder is, but there's nothing wrong in changing it to whatever you feel is best. It will be an adjustment of a day, two or three, but that's it.
I would recommend you take Pancakes out on car rides. Often! Short rides, even 5 mins. at a time and making it exciting will teach her that going out in the car is FUN! Many pups seem to get nauseous and sick, so if you can start on that, then you'll have better odds. There are harnesses and crates, seats and other type of belts to keep them safe. I personally got harnesses for both Ricky and Sammy and it's what works best for them.
Also, teach Pancakes that grooming is fun from day one. Comb/brush her, either on your lap, or on the kitchen table/counter. Make it a daily thing and treat her once your done. A nice massage and a bit of a treat makes it a pleasurable experience and she won't be afraid of the grooming process. Handle and play with her paws, ears, mouth, eyes..... a LOT !
Ok..... I'm writing a novel here. Sorry ! I'm almost as excited as you are!!