I'm curious you mention having to change up with the dog foods with Blue Buffalo. Was it do to her refusing food? Or not eating all of it when it was offered?
She's went a week without eating...are we talking exclusively? Or is she getting treats and just not her food? I've never heard a dog give up food for an entire week for not liking it. It makes me wonder if something medically is wrong.
What sort of problem does she have?(which I don't really give her any because she has GI problems)
I know my own vet said it is hard on a dog's system to constantly change out their dog food.
If she's used to canned...have you just tried softening the kibble with warm water...and allowing it to go soft before giving it to her? I have never heard of a dog going a week without food unless they were sick. I have heard of a dog not eating all their kibble in their bowl at times...it doesn't mean they don't like it...it means the allotted amount on the bag is marked so they can sell more dog food. My Ahsoka won't finish her kibble...She eats until she's full and walks away. And then I pick up her bowl until her evening meal.