Hypothermia is a condition when body temperature drop down below normal level of poultry. its also called cold stress. normal temperature of poultry 41-42 Celsius. So hypothermia occurred when temperature getting down it. Its most common problems for chicks age between 01-14 days when environmental temperatures dropped below 15 Celsius.
External Finding huddle chicks aside specially day light area due to imbalance temperature in poultry house thus create hypothermia & birds huddle in winter season. Body surface near abdomen became red in color when chicks involved severe piling Chicks touched to moist & congested underlying skin surface inflammed by huddled Sometimes unfeathered area of chicks are seen in severe piling by huddling together at one place Feed remain undigested due to birds refused cold water at night time (15°C) & died in morning when fresh water coming Crop remain full with feed due to digestion not possible when temperature drop down below 18°C & birds busy in huddling at night in winter season Internal Findings Accumulation of blood on heart auricle. In severe hypothermic condition body needs excees heat for maintaining balancing inside & outside temperature Thu why heart became highly pressurised to increase blood flow but unable & ruptured blood vessels in winter. Ruptured of right aorta when birds forcefully pumped the heart to increase blood supply to extremities for production of heat in cold stress. severe congestion of lungs when excessive respiration to increase metabolism by which produced heat in hypothermic condition Profuse mucus secretion as well as bloody discharge in lung followed by ruptured rights aorta destruction of hepatocytes by abrupt blood followed by ischemic necrosis that why liver became, harden , increase in size, wide area of necrosis & discolor death after huddling white necrotic foci, increase lobulation & shaped of liver in chicks kindney became severe inflammed due to increased it’s activity during hypothermic stage in severe cold. Frothy & ballooning of intestine due to acidosis when birds deprived water in winter Related Post Postmortem Findings Of Chicks in Coccidiosis Fowl Typhoid: Clinical Signs In Chicks Fowl Typhoid: Postmortem Findings In Chicks Low pathogenic Avian Influenza In Poultry