The Covers Pull or sometimes referred to as NMI (night mare interrupter) is another tool that works well for many different tasks.  The plastic clip will bite down with a turn of the knob.  It will attach to most bed coverings giving the dog a target and controlled location point.  The dog can now grab the nylon pull with sewed in end knot and either turn down the covers on a bed or retrieve the tab (with covers attached) back to the person.