Abstract: A novel method and apparatus for obtaining the electrocardiogram (ECG) in small conscious animals, such as mice, without the need to anesthetize or instrument the animal, are described. The apparatus includes an array of conductive pads, embedded in a platform, the pads sized and spaced to advance contact between an animal's paws and the pads as the animal freely moves upon the platform. Electrical circuitry to the pads is configured to sense the parings of pads and paws that render an interpretable ECG signal and to activate or deactivate recording of the signals. The apparatus is suspended above a surface to minimize the range of motion of the animal without physical restraint.