A system and method for monitoring the health of an animal using multiple sensors is described. The wearable device may include one or more sensors whose resultant signal levels may be analyzed in the wearable device or uploaded to a data management server for additional analysis. One or more embodiments include variations of the UWB system to accommodate differences in animals, such as scheduling or attempting transmissions between the wearable device and the data management server in such a way as to increase the likelihood of a successful transmission.