Erik,
The bear, as far as I remember was called Voytek (?) and was picked up by a Polish Artilliery unit as a cub and was a mascot, however, he (she?) decided to help out and used to carry the ammunition from the limber to the gun. as a result was incorporated into a cap badge. After the war it ended up in a zoo in Scotland (Dundee or Perth) where (apparently) the keepers had to learn Polish to talk to it! I am supposed to have been taken to see it by my uncle when I was a kid, (who DID charge Panzers on a horse in 1939)although I doubt this as according to the book, see later, he, the bear, died before I was born.
The book is called 'Soldier Bear' I don't know who wrote it or the ISBN number although I do remember reading it a good few years ago.
I realise that's a bit long but could be a good vignett?
HTH
Craig