From the Picture they Look like ISA browns which is the typical factory bird they lay way over 300 eggs a year. They will burn themselves out in about 3 to 4 years though. We did fairly well with the ISA's. Eggs all winter from those egg laying machines.
We are down to just one old ISA brown she is 4 years old still lays a couple eggs here and there she was our best layer for several years. We went to Black sex links, Barred rocks, Ameraucana, And Black copper French Maran only 9 birds.