Abstract: An ozone supply device is described for generating ozone and supplying the ozone to a livestock feed system for application to livestock feed to sanitize the feed. The device includes an intake port for receiving air from outside the device, an ozone generator for receiving air from the intake port and converting oxygen in the air to ozone, an ozone compressor intake for receiving ozone produced by the ozone generator, a compressor pump for compressing ozone received through the ozone compressor intake, and an ozone supply line for transmitting compressed ozone to a livestock feed system for application to the livestock feed. The device also includes an ozone meter and display, a timer, an inverter, and one or more housings. An adapter is interconnectable between the livestock feed system and the ozone supply line of the ozone supply device to connect them together.