Effects of dietary chicken grill and sunflower seed oils on performance, egg yolk cholesterol level, biochemical parameters, and oxidant/antioxidant status of laying hens

The objective of this study was to investigate the effects of dietary chicken grill oil (CGO) and sunflower seed oil (SO) on performance, some serum and egg yolk biochemical parameters, and blood and liver oxidant/antioxidant status of laying hens. Fifty-four 19-week-old Lohmann laying hens were randomly assigned to three groups. The groups were fed experimental diets containing 5% SO, 5% CGO1, or 7.5% CGO2, respectively. Diets and water were provided ad libitum over 17 weeks. The feed efficiency ratios and cholesterol content in egg yolks with cholesterol and the triglyceride levels in serum were not affected by the diets. However, egg yolk triglyceride levels were affected by diets (P < 0.05). Among the egg quality parameters egg yolk color was affected by the diets (P < 0.01). The blood biochemical parameters did not vary with CGO supplementation. Serum ALT activity was not influenced by the dietary CGO treatment, whereas serum AST activity was significantly different for the three diets (P < 0.01). The dietary CGO did not affect blood and liver MDA levels with antioxidant enzyme activities. Therefore, up to 7.5% of CGO can be used in diets of laying hens without adverse effects on performance, egg yolk cholesterol, and oxidant/antioxidant status.

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