what is the dose using the goat wormer per bird?I've been using Safeguard goat wormer. You can get it at most stores and TSC for sure. I am planning to switch to Valbazan when my current supply runs out. It's more expensive, but I believe it's a single dose, critically important with a large number of birds, but maybe not such a big deal for you.
I add it to wet feed to treat a whole pen at once, but catching them and administering it orally is much better if you can do that. Get a helper unless you have 3 hands.
There are several really good threads here on BYC about worming, worth a read and then you will be an expert on the subject.