R.A.B.B.I.T, The Recreational Animal Boasting Beaming Ideals Terrifically, was designed initially as a small scouting agent for field scientists to get a lay of the land remotely while simultaneously providing cover in the form of a rabbit-like shape. Ultimately, the project was abandoned after the developers of the program and machines "Couldn't handle the idea of those poor little things being hurt on our behalf." Other sources quote a bitter leader on the project as suggesting it would have gone better "If we hadn't made them so damned cute."
These days, a few can be seen rebooted mysteriously and hopping about, as if they never knew they were anything but a normal rabbit. They're supposed to be good luck!