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Effects of feeding diets containing DDGS to immunologically castrated (IC) pigs were evaluated by assigning 863 crossbred pigs (8 weeks of age;BW = 21.5 ± 0.2 kg) to 1 of 4 dietary treatments and 1 of 3 marketing times post-second dose of Improvest(R) (GnRF analog diphtheria toxoid conjugate;Zoetis,Inc.,Madison,NJ).