When Pets Become Irreplaceable01/03/2015January 3, 2015Every step is a struggle for Dietland Erber. An accident has left her with extremely stiff muscles. Her dog Bentley helps her to manage many day-to-day tasks.https://p.dw.com/p/1EEY4AdvertisementMan's Best FriendTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video