Sephardic/Mizrahi Jewish Genetic Diseases. 1  Alpha-Thalassemia. 2  Ataxia Telangiectasia. 3  Beta-Thalassemia (B- 4 T) Corticosterone Methyloxidase Type II Deficiency.  Costeff Optic Atrophy (also known as Type III 3-methylglutaconic 1  Aciduria) Cystic Fibrosis.  Familial Mediterranean 1  Fever. Familial Tumoral Calcinosis.
They will lay best at 1 to 2 years of age. All pullets (female chicken under 1 year of age) lay small eggs at first and after a while will lay larger eggs. Younger hens will lay 1 egg every 3-4 days. A hen 30 weeks old can lay 2 eggs every 3 days.
Your hen may live a long time, but she may not lay the entire time. By the time your hen reaches three years old, her egg output has dropped to 65 percent of her maximum laying ability. This declines rapidly to where if your hen lives to 10 years old, she will only lay 20 percent of the maximum egg output of her first year. Matilda, the hen that lived to 16 years old, did not lay eggs.