Dietary electrolyte balance (DEB) is important to broilers, especially in heat stress conditions. The anion content of both vitamin and mineral premixes should always be included in the calculation of ionic balance in finished feeds. With practical potassium levels of about 0.85% and the recommended levels of sodium and chloride, a DEB (sodium + potassium - chloride) of about 220-230 mEq/kg will be obtained. This is satisfactory and, as indicated, most emphasis should be given to the control of chloride levels.