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.
Report Abuse. Most breeds start laying about 20-22 weeks and will lay every day or every other day for about 3 years. They will lay after that but not as much. If people arekeeping them for eggs they usually kill them and use them for stewing hens after about 3 years.hey will continue to lay well for about 2 years, then they start to taper off,...might lay 3 eggs a week then 2. Most farm people do not keep laying hens beyond 2-3 years..they go into the pot. But if you plan on these being pets...well, as long as you're willing to keep feeding them.....