If it is gapeworm ( which I dont think itis but never the less) you better check the others rarely does just one have it. Also you will need to retreat in about 7 to 10 days. gapeworm symptons-gasping, coughing, eyes closed, head drawn in, yawning, head shaking, death. possible respirtory disorders- air-sacdisease,aspergillosis, chlamydiosis cholera CRD, cryptosporidiosis, emphysema,flukes, infectious bronchitis,infectious laryngotracheitis, infectious synovitis influenza newcastle, pox, roup, swollen head syndrome which all of these have somewhat similar symptoms and most are treated with antibiotics.