I have 8 hens and 1 rooster. All Rhode Island Reds. This past spring one of my hens hatched 4 eggs. 2 girls and 2 boys. They are now full grown and I have recently started letting them go outside with my 1st flock. They seem to stay to themselves while free ranging. My question is do chickens inbreed? Will the brothers mate with the sisters or mother? Sisters with the father? Do I need to separate or find homes for the chicks? Are the eggs safe to eat?