Ideas of what’s killing my chickens?

[chayes04]

we’ve had 3 chicks found dead in the coop. No trauma or anything. infectious disease?

 

[chayes04]

they’ve been found over the course of a week or so. Only found one dead at a time

 

[FrostRanger]

I would refrigerate the body of one of them (don't freeze) and contact your state poultry extension to arrange for a necropsy.

Are any of the remaining chicks presenting any symptoms? What are they eating? Do they have chick grit? Can you post a picture of your setup?