Do you use any type of lightbulbs in your coop? Some bulbs are harmful to birds.
I'm sorry for your loss.
From: Hannah Kirshner <[address removed]>
To: Just-Food-City-Chicken-Meetup-NYC-list <[address removed]>
Sent: Wed, Mar 27,[masked]:05 pm
Subject: [Just-Food-City-Chicken-Meetup-NYC] sudden chicken death