We are almost to my boyfriend's hometown, it's a four hr drive. We had to leave in a hurry and of course I forgot something...Luma's food!

We packed her food and water bowls, but no foos, lol.
His hometown is very VERY small, and the closest petco is an hr away. She eats Taste of the Wild puppy, the orange one. We're going to be away for a week. What in the world do we do? I don't want to drive far away and buy a whole other big bag of food. I feel really stupid but it happens. What is the best brand of food they have available at petco?
I don't want it to upset her tummy switching food but she cant starve for a week. Could I cook for her? What could I make?