“…Many of the components of essential oils have multifunctional properties. Cinnamaldehyde, eugenol and menthol for example, are known to increase voluntary feed intake as well as stimulating nutrient digestion and exhibiting anti-bacterial properties (Lee et al, 2004;Kamatou et al, 2005;Oussalah et al, 2007;Santurio et al, 2007;Rusenova and Parvanov, 2009;Bravo et al, 2014). As many essential oils have anti-microbial properties, many researches have been conducted to use them as alternative for antibiotics (Schelz et al, 2006;Santurio et al, 2007;Karadas et al, 2013;Shapiro et al, 2013;Bravo et al, 2014).…”