I'd read that it was measured in "pea" sizes lol. Didn't end up going that route so didn't look into it further.
Grab em off the roost at dusk and 1 person holds, 1 person loads the syringe and fires it into their beaks.
Fecal float would be the most accurate way to see what worms you have...
No postal scale, kitchen scale, or even a bathroom scale? A bathroom scale isn't terribly accurate but you can weigh yourself, pick up a bird, weigh both of you, and subtract to get the bird's weight.
Even a smaller EE weighs in at around 5 lbs, which is... 1.25 ml. More than double the...
Weigh a couple of birds and get an average weight. My birds at last worming weighed from 2.5 lbs (pullets) all the way to 7 lbs (head hen). A 7 lb bird's dosage is roughly 1.75 ml so if you have any larger birds they're underdosed if you only used 0.5 ml per bird.