Since you like learning, just as an FYI, roosters are chickens too chicken is the species just like cat or dog and then hen and rooster are the genders. Unless they’re under 1 year old then it’s pullet and cockerel. But yeah. oh and Marans is a town in France that the breed is named for hence the s on the end. Hopefully this didn’t come across as rude or anything, I just wanted to clarify and yeah.I always find it interesting to learn more about chickens. If I buy eggs for hatching I definitely want to buy from someone who focuses on breeding for dark eggs.