You could do it orally with a syringe 1ml syringe. Max dose I would use is 0.06 ml per pound, that's 10mg/kg, which is the amount that Plumb's Veterinary Drug Handbook recommends for chickens.
Pictures from book:
-Kathy
This is why I like to know how many mg/kg of medicine to give. My next experiment is to figure this out for the different tubes of ivermectin/praziquantil.
If you want to treat for just tapes, you could buy just praziquantil. I don't know what the safe doses of z-gold are, but it's on my list of experiments to do.