Agolin Ruminant<sup>&#174</sup>, an Essential Oil Blend, Increases Energy-Corrected Milk and Feed Efficiency in a High Component Dairy Herd

Agolin&#174 Ruminant (Agolin) is a blend of essential oils developed to improve feed efficiency while at the same time reducing rumen enteric methane production. Studies have shown that product improves lactational performance, but range results has been varied. This experiment evaluated effects additive Agolinon milk production in high-component (fat and protein) dairy herd when provided for an extended time. The was conducted large commercial Pacific Northwest, USA. Eight pens cows (350 500 cows/pen) were blocked by production, within blocks randomly assigned treatment. All received common total mixed ration. Treatment consisted providing 1 g/cow/day Agolin test group. A 4-week adaptation period followed 11-week study period. Milk composition determined cow averaging daily performance one-week before start trial (covariate period) last week each two periods. Feed intakes pen yield 1.11 kg/cow/day greater (P different = 0.854) between treatment groups midpoint increased with 0.002) end trial. Energy-corrected milk/feed ratio, based on parameters, significantly altered final (1.48 vs. 1.64 kg/kg control treatments, respectively).