@Walter Hinteler,
Thank you so much for this wonderful historical panorama, Walter.
I do have an obligation to the late Mrs Kohl, who invited me to the ceremony at Sans Souci, to say that it was a stunningly beautiful day, bright blue skies, and - she noticed, I didn't - such an embarassing time for the Prussian Guard: all of them were crying (as were practically all the guests) but they, unlike us, couldn't reach for their handkerchiefs, having to stand at attention as they did, so the tops of their uniforms in the front were quite a darker (wet!) color by the time the ceremony came to an end. But, definitely, doggies were not involved at the time.
At a more general level, and thinking of my late relatives who died at points many miles east of Potsdam, I wondered about the utter sense of defeat that must have overwhelmed what last few defenders decided to dig up Ol' Fritz and carry his coffin westwards. To his eternal credit, General Patton, a great student of history, met them and ensured the security of the coffin and remains, of the bearers, and, ultimately, of the land itself. All those who attended the ceremony at Sans Souci heard this said by the Bundeskanzler, and while I'm sure his remarks were carried on TV I wanted to repeat them here in case you missed them. But.... no dogs were mentioned, I don't know why