I got these 2 from a feed store, they said RIR, but I'm thinking something else, because they're not as dark as some I've seen. In these pictures they're probably between 5.5 and 7 weeks old. I have suspicions that one is a rooster, but I don't know if it's just because it is older. In the first two pictures, the bigger one is in front, in the last picture it is in the back. Thanks for any help!