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Comparative digestibility and digesta flow kinetics in two breeds of sheep

Recent studies carried out in cattle, sheep and goats have shown differences between both species and breeds of ruminants in digestive capacity, digesta flows and fermentation rates. Most of these differences are related to their feeding behaviour and digestive physiology and could affect digestive utilization of feeds. The aim of this work was to study the digestibility and digesta kinetics in the whole digestive tract in two breeds of sheep (Churra v. Merino).Ten non-productive mature sheep (five Churra (mean LW= 44.3kgÂ±3.20) and five Merino (mean LW= 46.7kgÂ±2.22)) fitted with rumen cannulae were used in this study. Animals were fed once a day 1 kg of alfalfa hay (877 g DM/kg; 169 g CP/kg DM; 489 g NDF/kg DM).