In the present experiments, preweaning and nursery
growth performance were not influenced by supplementing
vitamin D3 above the normal industry inclusion
rates. Although numerical differences were observed in
weaning weights of pigs dosed with vitamin D3, no statistical
differences were found; therefore, it appears additional
supplementation may not be a significant factor
in preweaning growth. Rortvedt and Crenshaw (2012)
found that growth performance was decreased in nursery
pigs that were fed diets with no supplemental vitamin
D and marginal Ca and P concentrations after sows
were fed maternal diets without supplemental vitamin
D3. The authors did not report any observed decreases