Pup weights (g) by nutrition group on PND 5, 7, 9, 11, and 13. The 6/25 pups were smaller than 18/25 pups (PND 7, 9, 11, and 13, P < 0.05) and 25/25 pups (PND 5, 7, 9, and 11, P < 0.05). The 12/25 pups were intermediate in weight; not different from 6/25 pups but smaller than 18/25 (days 7 and 13, P < 0.05) and 25/25 (days 7 and 11, P < 0.05) pups. The 18/25 and 25/25 pups did not differ in weight on any day tested.