Although White Leghorns are probably the most outstanding production layer in the world and what my folks raised, they are not a good breed to mix with docile or smaller breeds. I had to not only re-home my Leghorns, but my Marans also because these breeds are just too aggressive to downright cannibalistic around sweet temperament breeds. I cycled through 13 chickens in 5 yrs to get down to the 4 hens I now enjoy - 2 Silkies, a Blue Wheaten Ameraucana, and a Blue Breda. I know there are sweet gentle giant breeds like Brahma, Favie, Bielies, etc, but I won't have any breed weighing over 5-lbs because of the gentle 2-lb Silkies in the yard - the little girls have been terrorized by too many dual purpose and egg layer breeds so now I only keep lighter-weight birds with sweet temperaments. What a difference!