I use irfandog voodoo imagemanipulator softdogware 3.1. With this simple software I have been able take a picture of a dog, scan it with any available scanner (mine is HP Officejet 7310 all-in-one). Then I transfer the image of the dog (in jpeg format) into the irfandog voodoo imagemanipulator softdogware 3.1 and click on "Resize Dog".

Be careful not to over-do it. Sure, the upside is attractive -- very, very small backyard piles -- but make that dog too small and fences become totally useless. And nobody wants to be out searching the neighborhood for a weinerdog that you can barely see.