I am going to use Ivomec Plus to treat my chickens for mites. I believe some may also have lice, but I'm told that most poultry lice isn't the sucking kind, so ivomec won't work. I am wondering what dosage to use for large poultry and bantam poultry as well. Is it 1 mL on the base of the back of the neck (poured directly on the skin) for large poultry and 1/2 mL for bantam size ? Also, I was planning to treat a second time after 7 days from the first dose, is this ok ? Is their an egg withdrawal time ?