Combine grape jelly and BBQ sauce into slow cooker on high. Stir occasionally until jelly has liquefied. Cut hot dogs into bite size pieces; add to sauce. Cook on low 4 to 6 hours or on high 1 1/2 to 2 hours. This allows hot dogs to absorb flavor. Add more or less jelly and sauce to taste. Be sure hot dogs are covered in sauce. Ingredients are approximate depending on size of slow cooker.