Hen eggs are one of the most popular animal products. They are oval in shape and light creamy to brown in colour. They have thin, porous shell, liquid transparent white and round yellow to orange yolk. Hen eggs for trade are labelled with special numbers on the shell, which usually consist of the farming system code, state code and plant code. Organic hen eggs are high quality. They are indispensable in many kinds of dishes and pastries, both sweet and savoury.  They are commonly eaten for breakfast, fried, soft or hard boiled, scrambled or in omelettes or pancakes. They are also one of the basic ingredients of cakes, desserts, sauces, meat balls, batter and liqueur.