They started chest bumpingThe comb looks somewhat like a male, but because it is a mix I can't tell for sure if it has streamers. The crest also looks waved back but again it is a mix and most mixes are waved back. I believe it could be a male, it maybe a female, but that is one of the more tricky birds I've seen. I'm sorry it's just too confusing of a bird so don't take my word for anything. But the buff is a pullet and gray is a Cockerel, that is the most likely outcome I can tell you.