As she will eat the food eventually for the most part it could be that she's just not that 'foody' a dog or she isn't really fussed on kibble, both of those are fairly common. It is also pretty common for them to go through a fussy eating stage as pups and for them to like to carry a few mouthfuls somewhere else. I haven't heard of Canine Cook but if she's eating enough to maintain her energy levels and growth and keep her in good condition then I wouldn't be too worried at this stage. You can do things like add a bit of wet food, sardines, egg etc. to her kibble to make it more appealing but there's also the risk that that could make her more picky and/or she'll hold out for better stuff so you need to weigh up how you think she might react to that.
I have Rodaidh and Caoimhe on a half kibble and half barf diet, they get Barking Heads kibble in the mornings and raw in the evenings. Rodaidh has never been massively keen on dry food, he much prefers the raw stuff or sardines, Nature Diet etc. but I know he will still eat the kibble when it's put down to him, he knows that if he turns his nose up at it he won't be given anything else so getting barf food for dinner hasn't made him fussy.