The dose is 2 drops for an adult pigeon, so adjust in proportion to your chicks' size vis-a-vis a pigeon.Ok thanks for that info. And it would be ok to use a tiny bit on the chicks? That’d be good to protect them as well.
Should i discard her first 7 eggs then when she does lay again? Even if it’s a while after the treatment?
Re: discarding treated hen's eggs, Ivermectin is given to humans to treat e.g. scabies, (see https://bnf.nice.org.uk/drug/ivermectin.html )
so I can't imagine it is really a problem. It is just that it has not yet been licensed for use as a veterinary medicine for chickens.