Stuntman and pilot Jean Falloux died in an airplane crash in September 1967 during the filming of the movie. A tribute to his memory is in the beginning credits..
Don't you offend me! You are just a silly little man, a tiny man, a tiny man, no aristocrat in you!
Around 00:49:29, the dog is brown. On the next shot, the dog is beige (and from another race).