Although they are all eggs and rich in protein, ducks are used to looking for fish, shrimp and snails in the water or by the river, or for loaches and earthworms when farmers turn over fields because of their living habits and conditions suitable for large-scale farming. These are high-quality protein vitamins and minerals, so the shell of duck eggs has a special color called duck egg green, and eggs are generally produced by laying hens. The rare local eggs are also fed with whole grains, and the consumption level is very high.