So we have one very large rooster (Unknown Breed), 6 Buff Orpington hens (2 of which are 5+ yrs old), 2 Leghorns who have just started laying, a New Hampshire Red, a Sapphire Splash, and a Barred Rock. The 4 younger Buffs are 3 years old (About to be 4 this spring), the 2 Leghorns are mature...