Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal

Home page

A model of the herd functioning to assess the milk production and the feed efficiency in dairy goat systems

INRA Prod Anim 25(3) 291-304

L. PUILLET¹ ,², M. TICHIT³,⁴, O. MARTIN¹ ,², D. SAUVANT¹ ,²,

1 INRA, UMR791 Modélisation Systémique Appliquée aux ruminants, 16 rue Claude Bernard, F-75005 Paris, France

2  AgroParisTech, UMR Modélisation Systémique Appliquée aux ruminants16 rue Claude Bernard, F-75005 Paris, France

3 INRA, UMR1048 Sciences pour l’Action et le Développement Activités Produits Territoires, 16 rue Claude Bernard, F-75005 Paris, France

4 AgroParisTech, UMR Sciences pour l’Action et le Développement Activités Produits Territoires, 16 rue Claude Bernard, F-75005 Paris, France


This paper describes a dairy goat herd model, which simulates the effects of management practices on herd performance. The model is based on the interaction between a decisional system and a biological system. The biological system represents each animal based on a dairy goat model. The decisional system is based on the technical operations of feeding, reproduction and replacement. Three experimental plans were run to test the effects of i) the energy level of the diet and the mean herd production potential; ii) the number of steps within the feeding plan and the length of the breeding season and iii) a simplified management of the herd. The model enables assessing milk production and feed efficiency at both herd and individual levels. The results showed that the feeding level and the mean herd potential have marked effects on milk production and feed efficiency through a dilution effect of the production cost by the quantity of milk produced. The results also showed that the degree of segmentation of the feeding plan modulates the effects of the feeding level. By looking at biological individual variables, it was possible to discriminate management practices which led to similar performances at the herd level. These practices generated different biological risks, which can potentially modulate herd adaptive abilities to environmental perturbations.

Download documents