Powdox is to be administered in drinking water. For chickens, give 10 - 20 mg of doxycycline / kg liveweight / day for 3 - 5 days, provided by 0.1 – 0.2 ml of Powdox per kg per day. For pigs, give 10 mg of doxycycline / kg liveweight / day for 5 days, provided by 0.1 ml of Powdox per kg per day.
Medicated water should be the only water available. It may be used only for 24 hours and should be made up freshly every day. If no improvement in clinical signs is seen within the recommended duration of treatment, the diagnosis should be reviewed and the treatment changed.