I understand the Queen's corgis (dogs) are inclined to make their presence known at the most inopportune of moments. A troop of them follows the Queen everywhere she goes. I read somewhere that it's not unusual for a certain, very distinctive odour to emanate from the resident corgis, even at the most sumptuous of Court occasions. Apparently, the correct protocol is to ignore it. I understand it is not the done thing to raise it with the Queen. She does not approve of having her corgis criticised. It's OK for them to fart in front of the Crown Heads of Europe, but you're supposed to pretend it didn't happen.
The Queens corgis are also vicious little mongrels. I was recently watching a television documentary about Australian entertainer and artist, Rolf Harris, painting a portrait of the Queen. When the Queen entered the room where he was waiting, the corgis were in tow. After the formalities, Rolf went to pat one of the little dogs. Before he could do so, the Queen said, "They bite!" He didn't proceed.
