A little over a week ago I got two 3 week old chicks from a farm. Both are wyandottes, but different colors. They have been inside, in a brooder, kept separate from a 3rd chick who was a week younger and had wry neck when I got him that same day. He died days ago, but was younger, and weak from the beginning. The other two had been eating and drinking like little pigs, flitting around and basically looking strong and healthy this entire time. Nothing has changed until at some point today I reached in for Gladys, the gold-laced one, and she was very lethargic. I gave her a drop of poly vi sol immediately, and got her to take two sips of water. I called my vet and left a message, but within 15-20 minutes, Gladys just fell over and died. I am devastated and kind of in shock. And, I am panicky for the remaining chick. Mildred is currently acting normal. But I'm afraid that whatever took Gladys so suddenly could also take Mildred. What could have caused such a sudden and complete crash? I immediately moved Mildred to a clean brooder with clean bowls and new bedding, by the way, since I have no idea what could have caused this.