Small hole in the egg shell

The image below was provided by Roodbont Publishers and is part of the Look, Think, Act series that will be published weekly on World Poultry. Hover over the icons within the image for more information or read more in the book Egg Signals, by Piet Simons.

Also interesting: What can the colour of rooster’s combs tell you?

These issues have to do with the birds’ health. Visit World Poultry’s health tool to learn everything you need to know about poultry health.