"Acoustic Kitty"

From Dominic Streatfeild, Brainwash: The Secret History of Mind Control:

The Office of Research and Development seems to have been especially interested in the idea of implanting microchips into the mammalian brain. By November 1961, 'feasibility of remote control activities in several species of animals' had been demonstrated. Six years later the Agency actually produced a cat ('Acoustic Kitty') that could be guided via remote control. The idea was that the cat, which contained hidden microphones, could be steered close to surveillance targets. Results were not good. A memo detailing plans for the first test, to take place on Monday, 20 February 1967, explains that the cat's operators should beware of traffic and that the team should 'secure gear and remove animals before rush hour'. They didn't. On its first field test the cat was run over by a taxi.