How Do I Get My Leg To Stop Twitching My Dog's Leg Won't Stop Twitching????

My dog's leg won't stop twitching???? - how do i get my leg to stop twitching

There is an 8-year-old shepherd-Rottweiler mix. Do you have any problems with the hips twitched, and now holds his back leg like a cramp ........ if you tickle something like a dog right leg panic, it is the small but steadily, to know why someone? (He himself is itching, no chips or)