Piglets helped a lot with 40,000 IU on day 1, provided they did not have diarrhea

Vitamin D Deficiency: What Is All the Fuss About?

nice story in National Hog Farmer. Before many piglets raised indoors were dying

Vitamin D levels: indoor pigs < 10ng/ml, outdoor pigs >50 ng/ml

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See also VitaminDWiki

• Rickets in Humans and domestic animals - March 2011

• Piglets getting single dose of 40,000 IU of vitamin D gained more weight – March 2013

• Swine with extra vitamin D more likely to get pregnant and have more and larger piglets – June 2012

• Piglets get more vitamin D than recommended by the govt, for piglets or humans – March 2012

• Overview Veterinary and vitamin D

• 130% more piglets after giving gilt Calcidiol, a form of vitamin D – Nov 2012

• "Free Range Lard" has lots of vitamin D and is good for you