We just got 2 barred rock and 2 rhode island chicks. They are all 2 weeks old. Yesterday we added 2 Easter Egger chicks to the bunch, which I was told were 2 weeks old. They are at least a head taller than the other 4 - is this just a breed difference? For the most part they all get along; sometimes they all sleep together, at other times the 2 EEs are paired up and the other 4 are on the other side of the brooder. One of the EEs has taken to hopping up on top of water (mason jar size) - is this early for 2 weeks old? I've also seen the EEs having a stand off more than once, standing fully erect with their heads out towards each other and then they run at each other. It honestly looks like what 2 roosters would do, but I feel like it would be early to tell gender based on behavior. Are there tell-tale signs of a roo in a chicks behavior this early on? I've never had chicks before though, just going based off what I've read so sometimes interpreting that into my brooder at home is perplexing! Thank you for any input!