LONDON (Reuters) - It could be a dream or a nightmare -- scientists have created a robotic dog that tells you when it's time for your daily walk.

Researchers at the Massachusetts Institute of Technology in the United States plan to recruit Sony's "canine entertainment robot" Aibo into the obesity police.

The dog would be connected by radio to the bathroom scales, a pedometer and a personal organizer in which the owner would note his daily food intake. Asked "How am I?" the robot would either jump excitedly, play funky music and flash colored lights, or flop down and play a dirge, according to whether its owner has followed his or her diet.

The plans for the robotic dog -- which need never be let out or fed -- are due to be presented to a conference in Tokyo on September 11.