Hi, Cindy! Living in an RV and doing lots of traveling sounds like so much fun!
I second theBCnut’s suggestion – it is very important for your dog to be able to transition quickly and easily, and preferable “cold turkey” from bag to bag and from brand to brand. If you need help beginning and maintaining a transition, let us know.
But because you asked for food brands that are widely available, here is what I would look for if I were you:
Pure Balance (all varieties) – Walmart
Rachael Ray Zero Grain – Walmart and most other grocery stores
Wellness (all varieties) – Petco and Petsmart, and some small boutique-type stores
Castor and Pollux (all varieties) – Petco and Petsmart, and some small boutique-type stores
Merrick (all varieties) – Petco and Petsmart, and some small boutique-type stores
Whole Earth Farms (all varieties) – Petco and Petsmart, and some small boutique-type stores
Nulo (all varieties) – Petsmart only
Nutro Ultra and Natural Choice (all varieties) – Petco and Petsmart
FreshPet (all varieties, refrigerated food) – Petsmart (maybe Petco too), and many grocery stores (not Walmart though, at least not the 2 I frequent)
In order of preference, I would shoot for Wellness, Merrick/Castor&Pollux/Whole Earth Farms, FreshPet, Nulo, and then Pure Balance, the Nutros, and Rachael Ray Zero Grain.
If you do get to a pet boutique, look for Victor, Earthborn Holistic, and NutriSource (all varieties within each are good). My personal preference are the grain free recipes (in all brands I recommended), due to higher protein usually, but those are all good brands anyway.
