When is the risk of heat-induced shell thinning highest on brown layer farms, and when does the respiratory cycle alter the blood pH?

Heat stress directly impacts eggshell quality through respiratory physiology. When ambient temperatures rise above 32°C, brown layers are forced to pant rapidly to dissipate heat. This hyperventilation causes excessive loss of carbon dioxide (CO2) from the lungs, disrupting the carbonic acid-bicarbonate buffer system in the blood and raising blood pH—a condition known as respiratory alkalosis. Because bicarbonate ions are essential for the shell gland to synthesize calcium carbonate (CaCO3) for the eggshell, this depletion immediately leads to thin-shelled, fragile, and misshapen brown eggs. To combat this, farmers must cool the air and add sodium bicarbonate or potassium chloride to the feed or water during peak afternoon hours. Physiology guides are maintained in the Poultry Encyclopedia, evaporative cooling systems and electrolyte boosters are sold on Poultry Plaza, daily egg and bird rates are tracked on Poultry Rates, and heat-resilient farms are listed on Murghi Mandi.