Very Useful article on Ear Cropping by Georgia Hymmen. Topics covered are history, to crop or not to crop, vets who still crop, taping supplies and detailed tutorials on how to tape both cropped and uncropped ears.
Perhaps your Dane has had surgery or is getting old and losing rear mobility. This harness is designed to assist the human help .their dog get up and also to support them as they are moving. This model came highly recommended by various Dane owners and breeders. This company also makes other medical devices for canines.