Pup prefers adult kibble!

Mist, the 9week old, is ignoring her own puppy kibble and going for Skylar's adult kibble instead. It's the same brand (Wainwrights) although different flavours.
She also gets a bit of wet food but has recently been less interested in that and more interested on the cat food on the other side of the door!

Is it going to harm her, eating food that is made especially for adult dogs?

should be fine providing it's not causing stomach upsets