[Britster]

It may just be the food/treats.... both Orijen and ZiwiPeak are pretty high in fat.... may be too 'rich' for her tummy. Peanut butter is also high in fat (though fine in moderation). But it may just be too much. Also, how much does she weigh and how much are you feeding her? A lot of people over-feed Orijen, it needs to fed a lot less than other foods.

I would cut out Ziwipeak, and only feed Orijen and try feeding just a bit less of it. Just to start. She shouldn't having somewhat runny poo every day. For reference, when my boy was eating Orijen, he would only need 1/2 cup of it and he's 16lbs and very active.