One of our almost 4 week old australorps babies died this morning. She had been having problems for about a week. Constant crying no matter hot or cool, difficulty breathing, hunched over almost like she was tripoding for congestive heart failure. the other girls in the brooder were unaffected. We tried everything, meds, warmer brooder since she looked like she was cold, electrolytes, her appetite was good and would perk up and fight for her share of treats until she wore out. From my experience with people as a former paramedic, I think she had a congenital heart defect. We were sorry to lose Rachael but are happy the other girls are OK.