Because of their docile demeanor and the large number of eggs they lay, ISA Brown one of the top sellers in the poultry industry. They are quite friendly and non-aggressive, making them an excellent bird for families. They are adaptable birds that will work well in a backyard or farm setting. Hens lay approximately 320 large brown eggs per year. The eggs they produce have excellent shell quality and texture. The beautifully rusty red adult birds weigh five to six pounds. ISA Browns are a sex link bird. At hatch, the chick females are red, and the chick males are white.