The Americans are now performing Dog DNA testing and are now commercializing it. There is a company over there called PooPrints, and they have hi tech methods to identify the DNA of dogs who poo in public - as well as subsequently identifying their naughty owners who fail to clean up the mess.
But for sure- responsible dog owners need to pick up the poo after their pet!
For great quality Dog Tidy Waste Bags, click on the hyperlinked text.
Dog Poo waste bags from Maxpak are used in public parks and gardens across Australia.