The aim of the update to CNCPS, now referred to as version 6.56, is to better predict bacterial growth in the rumen by adjusting the isoacid supply, which is considered a nutrient requirement for a portion of the microbial population in the rumen, mainly fibrolytic bacteria. 

The RUM&N group has fully implemented the update to the CNCPS 6.55 model, and the NDS platform is now equipped with version 6.56.

You will find more details on NDS with CNCPS 6.56 HERE.