Definition of ophthalmology for English Language Learners. medical : the study of the structure, functions, and diseases of the eye.
Pullet: Six Weeks to One Year. Young female chickens less than 1 year old that have fully feathered out and are about the size of large pigeons are called pullets. Expect your barred rock pullet to start laying eggs when she is about 16 to 20 weeks old. Once she begins laying, she should produce one egg every 25 hours â except during the cold, dark hours of winter when she may not lay at all -- until her first molt a year later.
Breeds such as Rhode Island Reds or Buff Orpingtons can lay more than 200 eggs per year. Whereas other breeds such as Ameraucanas or Silkies are known to lay less than 100 eggs a year. If youâre unsure about how many eggs a year your breed of chicken should lay, this beginnerâs guide to chicken breeds should help.