Avian Production Management

EGG QUALITY-SHELL COLOUR AND TEXTURE

• It indicates smoothness and roughness of shell surface and also indicates shell quality.
• Shell colour is due to the presence of pigments.
• Ooporphyrin gives brownish colour to the egg shell, which is normally seen in eggs laid by the Asian, the English and the American Class of birds.
• The pigments Oocyan causes other blue colour in eggs seen in eggs laid by the breed Aracauna.