Sorry for your loss. It is good that your vet suggested a necropsy, since most labs will do histology and test for certain diseases. Have you checked the feed that the hens were eating to see if there is mold or a bad odor? Could they have eaten something in the yard toxic, or a dead animal that might have been buried in a compost heap? Botulism and mold can kill rather quickly. I have lost 2 hens within a week of reproductive issues, but losing 2 in one night is very suspicious.
I agree with others to use Flock Raiser or chick starter for all with some crushed oyster shell in a separate container for the hen. Let us know what the necropsy shows, and we love to read copies of reports to learn all we can. Each state varies, so hopefully they will let you know soon.
I agree with others to use Flock Raiser or chick starter for all with some crushed oyster shell in a separate container for the hen. Let us know what the necropsy shows, and we love to read copies of reports to learn all we can. Each state varies, so hopefully they will let you know soon.