May I know where are you from? As far as I know, natural balance do not have kibbles for large dog, previously my golden taking natural balance and he is underweight. My dog have serious shedding prob too but after taking Go! Salmon, everything is improving
Try to bring your dog to walk as often as possible? What is her favorite thing to do? Walk? Play with toys? Tug? Squeeky toy? Play with her, she needs attention same as people when lose their partner.
Do not get a GR if you are worried about shedding as they really do shed a lot. Consider less shedding dog breeds like poodle.