Effect of dietary supplementation of licorice extract on egg quality and performance of hens

The objective of this study was to determine the effects of various levels of dietary licorice extract on egg production, egg weight, specific gravity, feed conversion ratio, egg shell quality and blood parameters. One hundred and twenty eight laying hens (58 weeks old) were used in a completely randomized block design to test four diets with 4 replicates of 8 birds each. The four diets were supplemented with 0, 2, 4 or 6 g/kg of diets licorice extract. Hens fed the diet supplemented with 4 g/kg of licorice extract had greater (