© iStock / Getty Images Plus / Neydtstock
Chicken eggs are economically beneficial
Young hens ovulate approximately every 25 hours. Regardless of whether the egg is fertilized or not, it will be excreted. This means that young hens lay 250 to 300 eggs per year until the first change of feathers at the age of 2 years, depending on the breed and husbandry (care, cultivation and breeding). Since chickens are also quite low-maintenance to keep, they are (unfortunately, often to their regret) very well suited to industrial egg production. But what about other "useful" birds such as ducks, geese and quail?