The cheapest place I could find it is Allivet.Any idea where I can get Valbazen?
The dosage would be 1/2 cc (ml) per hen. I like to squirt the dosage into a piece of bread and feed it to the hen in a private area where no one else can steal it.
Repeat the deworming in 10 days with a second dose.
You shouldn't have to worry about the 2 week egg withdrawal as they aren't laying.