Analysis of feed costs during fattening of lambs with respect to the quality of bulk feeds

agneau aliment pour animaux consommation alimentaire (animaux) consumo de piensos cordero costos costs engorde engraissement fattening feed consumption feed intake feeds gain de poids ganancia de peso lambs mathematical models nutritive value piensos precios prices prise alimentaire (animaux) prix valeur nutritive valor nutritivo weight gain