X2
Our leghorn is very mild mannered and our head easter egger is the leader of our flock lol. The only hens in our flock that seem jittery at all is our australorp and our jubilee's. Our oldest ee doesn't lay anymore. The ee under her are much moreid mannered. Not so dominant. Our ee roosters are pretty sweet so far. Only time will tell with the boys. If they follow the pattern that we have seen so far the chicks should have gentle temperaments with great egg laying capabilities. This is just with our personal hens though. Someone else's might not have as good a disposition..
Leghorn temperaments are unpredictable. They are active foragers and we had a very sweet alpha White Leghorn that we thought was incredibly gentle for a Leg but she went bonkers at 3 yrs old and had to be re-homed. We had a Buff Leghorn who cruelly chased the gentler smaller breeds and pulled out their crests and beards in dominance so she had to be re-homed by one year old. Just never know. On my folks' farm they raised Babcock Leghorns and only Leghorns so the birds were evenly matched in a flock and I never saw the good, bad, or ugly, of having a mixed flock of different breeds. I got so tired of re-homing bullies or aggressive hens that I finally nixxed any future dual purpose or common layer breeds and just went with smaller gentler backyard breeds -- in our case we want peaceful pets first, and eggs second. For the past year so far it's worked for us. All depends on what owners are looking for in their birds.