Dead chick with scabby sore?

[KLIL]

This morning I checked on my 4 day old chicks that I only just purchased at 2 days old and found one dead with what looks like scabby sore on its side and under its belly.

Has anyone seen this before or have an idea on what it could have been?
I thought maybe the other chicks had pecked it then someone mentioned maybe a disease. Now im worried about my other chicks if they may end up like this one.
My chicks are not with my other chicken as I quarantined them just encase.

 

[Sagey_7878]

I believe the other chicks killed it by looking at the wound. How many chicks are in there and can you please take a picture of the brooder?

 

[Sagey_7878]

They may also be bored so decided to attack a chick, and once they see blood/red, they’ll keep pecking at it.

 

[KLIL]

I believe the other chicks killed it by looking at the wound. How many chicks are in there and can you please take a picture of the brooder?

There was 8 chicks in a big hut with enough room. I don't have a brooder hen as I bought the chicks.

 

[Sagey_7878]

There was 8 chicks in a big hut with enough room. I don't have a brooder hen as I bought the chicks.

Can you take some pictures? A brooder is a place where chicks are raised! A broody hen is a hen that raises chicks.

 

[KLIL]

Can you take some pictures? A brooder is a place where chicks are raised! A broody hen is a hen that raises chicks.

Right ok. Yes I will take some photos.

 

[KLIL]

There wasn't any blood on the chick.

 

[Sagey_7878]

There wasn't any blood on the chick.

It doesn’t matter. The chicks would’ve seen its flesh and kept on pecking.

 

[KLIL]

It doesn’t matter. The chicks would’ve seen its flesh and kept on pecking.

Ok sweet thanks. This is why im asking as im new to this and I am trying to learn these things.

 

[Wyorp Rock]

I'm sorry for your loss

I don't think that is from pecking/injury from the other chicks. Could be wrong but the color reminds me of egg yolk. With where it's located, I would lean toward navel/intestinal infection like Omphalitis/Mushy Chick, subcutaneous edema or similar.
https://www.backyardchickens.com/articles/mushy-chick-disease-yolk-sack-infection-omphalitis.64686/

edited to add - if the other chicks had caused this, you would see a bloody wound and pecking/tearing of tissues.