<P> Twilight Bark (sometimes, Twilight Barking and Barking Chain) refers to the often - noted behavior in domestic dogs (Canis lupus familiaris) of exchanging barks or howls across long distances, typically in the quiet hours of early evening . </P> <P> The term' Twilight Bark' was coined by author Dodie Smith for her 1956 children's book, The Hundred and One Dalmatians, and the phenomenon figures prominently as a plot device in the book and in the 1961 animated Disney movie . Her 1967 sequel novel is The Starlight Barking . </P> <P> The original usage is: </P>

What is the bark called in 101 dalmatians