Broody hen went berserk

[The Birb King]

I wonder if the the hen knows there is something wrong with the chick, possibly even before it's hatched and that's why they kill them.

I had a Border Collie that gave birth to 4 pups. One pup was very tiny and weaker than to others. The dog killed the weak pup and buried it. Maybe, like the hen, she knew something was wrong and didn't want it to suffer.

Well out of the 13 chicks I gave to my hen, 3 needed help hatching and one really wasn't doing good for the first week or so it was clearly smaller and weaker than the others. She didn't care though she accepted it with all the others. It is growing and acts perfectly fine now at almost a month old.

 

[Altairsky]

I wonder if the the hen knows there is something wrong with the chick,

No she had 2 bad egg and she kept sitting on those. She ate a random live 17 day embryo because she was starving. As someone said here, mother instinct is strong, but survival instinct is stronger.
This hen refused to get up and eat/drink. Even if she had water an food 2 inches from the nest and she could see it from the nest, she was so obsessed with broodiness that she refused to get up.
So after I stopped forcing her out of the nest - as suggested-, and she was really starving, her survival instinct told her to sacrifice one of her egg for the greater good because, in her head, getting up was absolutely out of question.
So if anyone has an hyperfocused compulsive broody, get her fluffy butt off the nest at least once a day, or feed her in the nest. If she poops in the nest better deal with poop than the mess of blood, feathers and guts that I found scattered all over the eggs.

 

[Altairsky]

She's good so far. Now I need to clean that mess of a nest she left.

 

[Altairsky]

 

[The Birb King]

Nice. Chicks are starting to look pretty interesting

 

[Altairsky]

The yellow one is araucana, the black ones are Padovana which is similar to polish.