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The nitrogen requirements of cats during gestation and lactation were determined. Purified diets containing 200, 250, or 300 g protein (N 6.25)/kg diet, calculated ME = 20 kJ/g) and ≥ 1.5 times the minimal essential amino acid requirement of the growing kitten were fed for ≥ one month before mating and through gestation and lactation. Results during gestation showed that there were no significant...