Hubby got 2 Barred Rocks at the same time and 1 hasn’t grown much. Have gotten Wyandottes same time as well. All have grown a lot except Cruella, one of the Barred Rocks. Swollen, very warm belly. Squishy with a small soft knot on the left side. Eats but doesn’t drink much. Not active and waddles when she walks. She stays under the heat lamp or huddles with other chicks. Labored breathing, no sneezing or coughing, and I haven’t heard any wheezing. Also has ruffled feathers. Could this be ascites? I’ve added a pic with her near the other Barred Rock as well to show sizes.