We disclose a medical toilet that comprises one or more medical devices and a control for the metrics they collect. The medical devices may be used to collect metrics relevant to a user's health status. The medical toilet further comprises a conduit through which volatile organic compounds travel from the toilet bowl to the environment outside the toilet. An animal trained to identify the scent of bodily waste collected from a user that is afflicted with a disease perceives the scent of the user's bodily waste traveling through the conduit and performs a defined act upon perceiving the disease scent. The metric collected by the medical device(s) may be used to diagnose the same disease as that which the animal is trained to identify. The diagnosis provided by the animal by way of the conduit acts as a control for the metric collected by the medical device.
