Our vet sends samples off for us to Iowa State University. Because we live in Iowa, yours should send it to a lab in your state.Exactly, even with the two I had overheat when I was using the heat lamp, only the two right under the lamp were affected. Most of these were just walking around the brooder. Two were under it. A couple were partly under it. And they had all been fine. Trying to figure out what lab to send some of them to for a necropsy. Maybe my vet would do one. I'll call tmrw. My husband is gonna have a cow when he finds chick corpses in the fridge. But I need answers. So he's just gonna have to suck it up.