Yes, it's new to me too. I read somewhere that she preferred being photographed with dogs, rather than other people! So did her mother. Is this dog called Shadow, or is it a different one? Shadow has a statue at the Emperor's villa in Ischl. There are some nice dogs pictured with the Empress in Andrew Sinclair's 'Death by Fame' (1998). Countess Kleinmichel in her 'Memories of a Shipwrecked World' (1923) has a few pages on the Empress, and recalls going riding with her. She also reproduces that wonderful photo of the Empress on a couch, with Shadow at her feet.