The invention relates to the use of olive extract as a pronutrient in animal feed, which is obtained exclusively using physical methods. The extract can be used as a natural pronutrient in veterinary science, providing a significant improvement in terms of feed efficiency and other parameters relating to the feeding of birds and pigs. The extract is characterised in that it must contain the following majority products: maslinic acid, oleanolic acid, hydroxytyrosol and tyrosol in the free form or in the form of biologically-acceptable salts.