We are obviously new to the chicken scene, had 6 girls, Lily definitely was a Willy with loud " er, er, er .er.errrr s " throughout the day. Now Jane at 17 weeks will stretch her neck out and let loose with a few "er ,er, errrs". No big comb or large tail feathers and isn't aggressive towards the others as Lily/Willy was. Is there any was to tell for sure? We are only allowed to have hens in the city, no roosters.