E de la Garza Institute for Goat Research Langston University
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Feed Intake by Growing Goats in Confinement

Use this Feed Intake Calculator to calculate the daily feed intake for growing goats. Enter the data into the table and then click the Calculate Feed Intake button. The results will be displayed in the table at the bottom of the page.


We will use a 30-kg growing meat goat gaining 50 g/day consuming a diet with 11 MJ/kg DM of ME.
1. Choose biotype of the goat meat, 50% or more Boer
indigenous or local
2. Enter body weight (kg)
3. Enter average daily gain (g/day)
5. Enter dietary metabolizable energy (ME) concentration (MJ/kg dry matter)
To convert from English to metric system,
enter your values here.
They will be automatically entered into the table to the left.
Body weight (lbs)
ADG (lbs/day)


The approach used to develop predictions of voluntary dry matter (DM) intake by goats based based on an assumption of constant overall efficiency of utilization of metabolizable energy (ME). Therefore, ME requirements from other studies of this project were employed, along with assumptions of efficiencies of ME utilization. In accordance, inputs necessary to predict intake entail factors influencing the partitioning of energy use for various physiological functions, including production level. In is important to note that input of an unreasonably high level of production given the characteristics of the animal and nature of the diet will result in a comparable unlikely estimate of feed intake.

The concentration of crude protein (CP) in the diet did not have a significant effect on intake in the prediction equation development process. Therefore, accuracy of intake prediction is contingent upon the diet supplying adequate ruminally available CP for normal growth and digestion by ruminal microbes and an amount of metabolizable protein (MP) and array of amino acids absorbed in the small intestine sufficient to achieve the level of performance input.

Our example would require a voluntary DM intake of a 30-kg growing meat goat consuming a diet with 11 MJ/kg DM of ME and gaining 50, 150, and 250 g/day are 0.72, 0.91, and 1.06 kg/day, respectively.

predicted ME intake:
final or adjusted prediction of dry matter intake:

The source used in this calculation method is:

Luo, J., A. L. Goetsch, I. V. Nsahlai, J. E. Moore, M. L. Galyean, Z. B. Johnson, T. Sahlu, C. L. Ferrell, and F. N. Owens. 2003. Voluntary feed intake by lactating, Angora, growing and mature goats. Small Ruminant Research 53:357-378.