Oddly enough, one of my dogs was just diagnosed as being allergic to wheat, and I’m trying to figure out a gluten free diet for her-—there is gluten free dry food for dogs, but there’s gluten in a lot of other things like milk bones, etc, and most “treats” that we have been giving her.
I don’t think hamburger has gluten in it. Give it a try. My dog has been eating meat.