Six cups sounds like way too much. Especially for Orijen.
Lots of dogs get loose stools on Orijen as it is. Did you do a slow, slow transition? Since it's so rich, a lot of people have to do a super slow transition to get onto Orijen. With some dogs, it just doesn't work out. But I know some people feed 3 cups to their adults (sometimes less) and they thrive. So cut down on the amounts, and that might help at least a little.
Lots of dogs get loose stools on Orijen as it is. Did you do a slow, slow transition? Since it's so rich, a lot of people have to do a super slow transition to get onto Orijen. With some dogs, it just doesn't work out. But I know some people feed 3 cups to their adults (sometimes less) and they thrive. So cut down on the amounts, and that might help at least a little.