The influence of the relationship between concentrate and roughage on hoof condition by cows in the first lactation

affection podale alimentos concentrados analysis of variance bovin laitier claws concentrates dairy cattle ensilage (produit) ensilaje feeding level foin foot diseases ganado de leche garras grasa de la leche haemorrhage hay heifers hemorragia heno lactation milk fat milk yield modele modelos models niveau d'alimentation nivel alimenticio novilla nutritive value onglon peso poids rendement laitier rendimiento lechero silage valeur nutritive valor nutritivo weight