Hi, I have a mixed flock of 4 hens: 2 Belgian Duccles (about 1kg each), an Isa Brown (~2kg) and an Australorp (~3kg). The Isa Brown in particular has been showing issues with laying and may be underweight. Otherwise she seems fine, active etc We have been getting a lot of smaller wild birds into the run lately so I am worried about worms. They haven't been wormed for a while. I have some arisotpet chicken wormer and want to worm them but am unsure of the dosages. It states basically 8ml/100ml of water for every 3kg of weight. I have about 8kg of chickens. Does that mean I just mix up about 300ml of water with 24ml of wormer and let them at it? Doesn't seem right. Otherwise I can separate the larger two from the smaller two. In that case would it be 8ml/100ml for the larger and around 4ml/100ml for the smaller hens, and make sufficient volume of each to last the day? Just not sure what to do, any help appreciated.