Abstract: A variety of dairy cattle ration formulation software programs are available from foreign countries that have been applied in our marketplace. Inside these formulation programs, the nutrition models used are vital to the software. As the models are improved ceaselessly , ration formulation softwares also renovate endlessly. The purpose of this paper is to create a guide by evaluating a variety of commercially available software based on different nutrition models and observing optimizing results from different models and their computing softwares.

Key words: nutrition models; ration formulation software; animal description