I think "Eaglet" might be a rooster. We got her (I'm calling it "her" until I know otherwise) at 3-4 weeks old. She was smaller than the other 3 chicks at the time, and was the only one who didn't have back feathers. She was also the most skittish, and seemed to be lowest in the pecking order. Now she is 7-8 weeks old, and has just developed 3 rows and a pink spot on her comb. She is still thinner, but now a little taller than the others, and is probably 2nd or 3rd in the pecking order.
We really like her, so we hope she isn't a roo, because they aren't allowed in our area.
Let me know if you notice any other roosters in the flock too.
A couple weeks ago