Wheat free dog food

I'm about to become the proud papa of a bear hunting dog - an Akita. Her name is Katie. We've had an Akita before - so we know their temperament, and traits. The breeder says she has wheat allergy and feeds her "Natures Balance" dog food. This stuff is expensive !!! Anybody had any experience with this brand - or - can you recommend a less expensive alternative. If we go in another direction from what she is use to, we will have to go with the Natures Balance and gradually mix in "Something" else. Your thoughts please.

And for you old flatulence producers, do you remember the song "Beautiful Katie" ?