The Acana gets 5 stars here: Acana Dog Food | Review and Rating
That's a lot of pooping! LOL You could try adding a probiotic to her meals for a while and see if that helps. Your only other option is to pick up that poop the moment it hits the ground (beat her to it).
I've never had a dog who ate his/her poop, and I'm not sure why they do it.
You might be over feeding. Maybe try cutting back to the recommended portion for her size/age and see if that helps.
Has she had a fecal check recently? If not, I'd take a sample to the vet just in case. I do remember reading somewhere that dogs will eat poop if they're lacking in some nutrient or not absorbing nutrients (worms).