 The study found that there is a strong positive relationship between neutral detergent in soluble crude protein, NDICP, and pre-sequel indigestible crude protein, PICP, suggesting that NDICP can be used to estimate the part of protein that is not available for digestion in the small intestine. Additionally, there was a correlation between neutral detergent soluble crude protein, NDICP, and pre-sequel digestible crude protein, This indicates that the slope of the linear regression line between NDICP and PDCP is 0.9, meaning that the apparent pre-sequel digestibility of NDICP is 90%. Therefore, it is possible to predict pre-sequel digestible crude protein, PDCP, by multiplying NDICP by 0.9. Furthermore, because the literature identifies a similar amino acid profile in NDICP and NDICP within a given feed, this concept may be applied to amino acids as well. This article was offered by Annette Sainer, Susan Kirchhoff, a Susan Beth, and others.