Again, not trying to argue, just trying to understand how ivermectin worked for you. The dose on the 1% label is .2mg/kg, but I have seen some parasite books that recommend giving twice that, either IM or orally. The .05% dose is .5mg/kg. Chicks, laying hens and non-laying hens all consume a different amount of water (percentage of bodyweight) according to some info I have read, which you probably already know.
How much ivermectin did you put in one gallon of water?
-Kathy
I was confused. Too much fried crayfish as after lunch snack. Last time Ivermectin used by any birds remotely mine was more than 5 years ago. Ivermectin was used as paste and force fed to worm burdened roosters, hens and immature birds were not so treated. Current de-wormer is Wazine; confusion with Ivermectic due to recent discussion of its use with goats. Wazine currently used because it is effective and less labor intensive in its application. One oz of Wazine per gallon of water is concentration. Approximately 500 mL of solution is added fresh to each waterer daily for duration of treatment. Actual dosage varies as a function of water intake which never exceeds 400 mL and usually exceeds 50 mL which means dosage can vary almost 8-fold. Worm loss usually well underway within 24 hours. Actual treatment stresses birds and with rare instances where burden is very heavy, a bird will fail to survive.
Situations promoting worm burdens warranting treatment involve confinement over ground / foliage that does not dry out nor freezes and where lots of early life-stage worms are left by other infected birds. Simply moving confined birds frequently over fresh ground helps immensely with keeping birds from taking up excessive burdens. Some how simply cutting grass a couple days before putting pens over it helps with worm management. For some reason free-range hens and immature birds seldom have issue with such and underweight individuals are culled onsight that might be impacted by worms. The free-range birds forage extensively over same ground as that used for confined birds so they are exposed. When birds are acquired from outside my gene pool and exposed to same ground, worms can be particularly problematic for them especially when they come from a source where worm management is aggressive as in an effort to eradicate worms.