The usage of Potassium Chloride (KCl) at 0.5% to 0.6% in drinking water is a highly effective protocol for mitigating acute heat stress in poultry. While the dramatic increase in water intake is a primary mechanical benefit, the underlying physiological and metabolic mechanisms are what make KCl specifically valuable compared to other electrolytes.
Synergy with Sodium Bicarbonate (NaHCO3): In field protocols, KCl is frequently paired with Sodium Bicarbonate. During heat stress, birds lose bicarbonate through urine (to offset alkalosis), but this limits the bicarbonate available for essential functions, such as eggshell formation in layers. A combined water protocol, such as 1.5% KCl and 0.5% NaHCO3, can replenish both the intracellular potassium deficit and the extracellular bicarbonate pool without drastically skewing the overall acid-base balance.
Supplementing via drinking water rather than feed is the standard veterinary protocol during heat stress, as feed consumption can drop by over 20% while water consumption simultaneously spikes.