Lactation is the most energy-expensive feline life stage, peaking at two to several times maintenance depending on litter size and week of nursing.
Practically, feed high-energy kitten formula free-choice with ample water; nursing broths help but cannot replace the main diet's nutrient density.
Watch for eclampsia: sudden restlessness, panting, stiff gait, and seizures signal life-threatening low calcium needing immediate care, linked to misguided pregnancy calcium dosing.
Weigh the queen weekly and raise intake with a vet's input if she loses condition; wean gradually to avoid engorgement from abrupt stopping.
