Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange
Abstract
The aim of the present study is to determine whether certain metabolites of vitamin D3 (1,25-dihydroxycholecalciferol or 24,25-dihydroxycholecalciferol) added to the diet will affect shell quality in aged laying hens. This will be further evaluated by measurements of the carbonic anhydrase activity of the shell gland, blood serum calcium levels and calcium binding protein activity of the duodenum and shell gland
