HI, AND WELCOME! My three were the pickiest little brats on this earth, so I've tried it all. As long as you stay away from meat-by-products and grains you should be ok. There are a number of sites out there that have rated dog foods. This is one of the sites that I used when I was trying to learn about the different foods.
Dog Food Analysis - Reviews of kibble I hope that it will help you.
We started out with Evo, then raw for awhile, Innova, Solid Gold Wee Bits, and now I feed Wellness Small Breed. For treats, I just read the bags carefully to make sure there are no grains or meat by products. Best of luck to you. You'll learn what is bad for them soon. Oh yeah, I guess you know, absolutely no chocolate and no grapes, no matter how badly they want to taste what you are eating. Just wanted to mention that.