Toss them Mikey. Patties need to be used fairly fresh to be of value. Since yours are crumbly, they've had time to dry out and likely were exposed to warm weather. The nutritional value in patties lies mostly in the amino acids that comprise the protein. When warm and dry, those amino acids denature into products that are of little value to bees. The best way is to feed fresh but if that isn't an option, put any unused patties (or even dry sub) into a freezer; it will extend the shelf life considerably