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.
As the hen ages they stop laying every day and eventually stop altogether. The US Department of Agriculture reports the average hen lays about 260 eggs per year, about 5 per week. They have a lifespan of about 10 years and will usually slow egg production as they age.Many other factors can affect the bird's ability to lay, however. This will vary depending on the breed of the hen. You can expect the first eggs sometime around week 20 (5 months) Some hens take a few weeks longer to produce. Give t â¦ hem a boost by feeding a Laying pellet type feed that is a bit higher in protein and minerals needed to form good solid eggs.