Yeah I wouldn’t sell the eggs or the meat until the withdrawal time, but can I still hatch the eggs or are they not going to hatch then?
You'd have to do some research/reading, look up scientific papers and see what effects, if any that Ivermectin has on hatching eggs.
My question about other types of mites is because I *think* I'm done treating for northern fowl mites. Dusting with permethrin and spraying with permethrin was... an adventure. Even at night with a red headlamp, treating the birds on the roost was not the easiest or most efficient.
So if a few drops of liquid Ivermectin on the neck of a bird would work, that would be what I'd use if the problem recurs or if I didn't get them all and they resurge.
I also ordered some elemental sulfur and am going to mix that in with dirt/peat/ashes in a dust bath for them. And I'm going to put up a "bopping sock" above the pop door. I'd read that a sock with sulfur in that location was a good way for them to get some sulfur dust on their back, and that that was an old fashioned mite treatment for chickens.
Well.
Ivermectin is systemic, it's absorbed into the bloodstream, so for it to be effective in "treating" mites, the mites would have to have a meal (bite the chicken).
Ivermectin is probably better suited for when a bird is infested, has SLM (which live under the scales and feed on the bird) or for depluming (feather) Mites which also live on the bird (under the feather follicle and feed off blood).
If you are looking for Ivermectin to be a preventative, then it's not going to work as you might expect. You are better off using the sulfur dust that you mentioned.
Since you did have them in your coop(?) you may want to treat the coop/housing with a Permethrin based poultry spray at least once a month for while.
I usually spray my coops/nesting boxes/etc with Permethrin spray every few months, just to get into nooks/crannies, etc. As a preventative to hopefully keep bugs from taking hold. Birds, I may dust a couple of times a year IF I see there's an issue. Mainly broody or sick hens can start to attract lice, so they get a good dusting with Permethrin.
It can be a challenge to dust birds, the ones I have now, I don't handle much at all, so wow. Putting the dust in a sock and using it as a powder puff seems to work fairly well for me, at least I have a bit of control over the powder.
Hope that helps?