Administer orally at a dosage of 1,500,000 units of penicillin per gallon (3.8 liters) of drinking water for 5 consecutive days.
Combine contents and approximately 1 1/2 pints (710 mL) of water in a glass or plastic container. Stir to dissolve. Allow concentrated solution to stand until the foam disappears. The concentrated solution should be used up or discarded within one hour after preparation.
Automatic Watering Systems - Pour the concentrated solution into a glass or plastic container then add enough water to make 2.6 gallons (9.9 liters) of stock solution. [This amount of solution will medicate 333 gallons (1260 liters) of drinking water]. The automatic waterer should be adjusted to deliver 1 ounce (30 mL) of stock solution per gallon (3.8 liters) of drinking water. In automatic watering systems, prepare fresh solutions daily.
Gravity Flow Watering Systems - Pour the concentrated solution into enough water to make 333 gallons (1260 liters) of drinking water. In gravity flow watering systems,prepare fresh solutions every 12 hours.
Drinking water prepared as directed above will contain 1,500,000 units of penicillin G per gallon (3.8 liters).