It's better to use an oral syringe, to make sure they get it all. You can get them at any pharmacy, just ask, or most feed stores carry them in various sizes. It's not really very difficult, I do 30 birds every 3 months, takes me about 45 minutes, sometimes faster if they are all cooperative. Depending on how many birds you have, it will take less or more time. When you only have to do the two doses 10 days apart, it's easy to divide them in groups and stagger days, but doing the doses 5 days in a row, it's just easier to do them all at once. I lock mine in the coop at dark and go out early the next morning and take them off the roost one at a time and dose (if you need to get a weight an inexpensive digital kitchen scale works well), put the dosed one in the run, and go get the next one off the roost. When the coop is empty, you've gotten them all. If any don't like being held, wrap them in a bath towel like a burrito to help hold their wings.