Although the Miniature Schnauzer is not aggressive and is very timid, whatever dog you have, you still need to take precautions. Most of the time, even the most timid breed or pet can turn into an aggressive and brave dog at the sight of a stranger, that is why it is recommended for dog owners to obtain a warning sign that can be hung outside their gates or within their yard where visitors can easily see it. A Miniature Schnauzer Aluminum Guard Dog Sign can be best used for these purposes. It is made with aluminum and with a white sign blank with black graphics. This should warn your visitors that you have a pet at home, and that they should not do anything to provoke it from becoming wild.