Some other boxer owner found this site, thought it was interesting, and looks to be a lot like Timberwolf. I know some think Timberwolf is high priced but this food seems to be with shipping reasonable.
The Fish based formula is grainfree, (good for alergies) and only 25% protein! (good for pups).
They only sell online, thinking its rather new since the site was created in 2007.