Okay, I hatched my rooster... which is a speckled sussex. He is average size for his breed. I have two leghorn hens. One white, one light brown. The white one is smaller than the sussex roo, and the light brown hen is smaller than the white leghorn. Now the girls are only 5 months, will be 6 months Dec. 12. Shouldn't they be a little bigger? We didn't hatch the girls. We bought them from a nearby chicken farm at age 2 or 3 months. They hatched there June 12th.