Hi there,
One, she's not crazy. She's being a typical dog with PICA or rock-eating behavior. There are many reasons why PICA behavior is adapted by dogs. It's all here:
https://goldenretrieverlove.com/why-...i-do-about-it/. One of the most common though is nutrient deficiency. Check whether you are feeding the right amount of food with the right content to your dog.