An animal fitness monitoring system and an animal-worn device that is capable of receiving and sending various inputs and outputs, respectively, from/to a wireless mobile device. The wireless mobile device has a software application that allows a human user to wirelessly communicate with the animal-worn transceiver via direct, networked or cellular wireless protocols. The animal-worn device interacts with the applications on the wireless mobile device to allow for a variety of functions, such as the transfer of commands or stimuli to the animal, the transfer of data regarding the fitness or activity level of the animal to the wireless mobile device, and/or the transfer of instructions from the animal-worn device to an external device.
