This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain.
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See http://commons.wikimedia.org/wiki/Category:Pearson_Scott_Foresman_publisher
A sitting Rottweiler dog, in silhouette, second version (with eye and more empty spaces). Based on a picture I took of our late Duque, a wonderfully sweet dog. Done in Inkscape.