Abstract
This researh was carried out to determine the effects of adding different levels of fennel volatile oil (VO) to the laying quail diets on performance, internal-external egg quality parameters, and egg's oxidative stability. In the research, totally 105 (6-week-old) laying quails (Coturnix coturnix Pharaoh) were used. Quails were distributed into 3 main groups, and the main groups were also divided into 5 replicate groups. A basal diet that did not contain fennel VO was prepared for the control group, and fennel VO was added to the basal diet at 200 and 400 mg/kg levels for Group 1 and Group 2, respectively. Diets and water were given to quails ad libitum. The research continued for 56 days. At the end of current researh, the addition of fennel VO the quail diets did not effect feed efficiency, haugh unit, egg yolk color, egg weight, shape index, egg shell breaking strength. However, both levels of fennel VO increased feed intake (P
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