Sony has made Aibo much harder to resist for people who love chocolate-colored dogs. The tech giant has launched a tricolor version of its robotic canine with two shades of brown, and it's now available for pre-order in Japan. Since it's pretty much just a recolored release with no differences in hardware and software, it also costs 198,000 JPY (US$1,800) like the original Aibo, not including taxes and subscription fees. Sony promises to roll out a new security feature now that it has teamed up with security firm Secom, though. According to Engadget Japanese, the company will offer a 1,480 yen-a-month security feature in Japan starting in June, which will take advantage the robot's capabilities to recognize faces and to create indoor maps. The new service will give Aibo the capability to patrol the house and make sure all family members are safe and sound.