Embodiments include moisture addition systems and methods. In an embodiment, a system includes a vessel defining an interior volume, a fluid supply system to add fluid into the vessel, a first moisture sensor, and a control module. The first moisture sensor is configured to measure the moisture content of a material within the vessel, such as a total mixed ration (TMR). The first moisture sensor can include a microwave moisture sensor. The control module is configured to control the fluid supply system. The control module controls the amount and rate at which fluid is added to the vessel. The control module is configured to receive a signal regarding the moisture content within the vessel from the first moisture sensor. The amount or rate at which fluid is added can be varied based on the moisture content within the vessel. Other embodiments are also included herein.
