[PenniesMom]

Lyman Frank Baum [May 15, 1856-May 6, 1919] didn't include a breed in his description of Toto in the original 1900 book edition of 'The Wizard of Oz'. In Chapter 1 'The Cyclone', readers were presented with "a little black dog, with long, silky hair and small black eyes that twinkled merrily on either side of his funny, wee nose." The illustrations in the book led many to believe that Baum had in mind either a Cairn Terrier, or a Yorkshire Terrier, which was popular at the time of the book's writing.
In the beloved 1939 film version of 'The Wizard of Oz', the part of Toto was played by Terry [1933-1944], a Cairn terrier. In the 1985 film 'Return to Oz', the part was played by a Border Terrier.