I have two Speckled Sussex, both 11 weeks old, with very different tail growth. I'm still hoping they're both girls! I'm thinking I probably won't know until they either lay eggs or crow, but I'm curious what the guesses are at this stage.
Here is the first, with just a tiny little tail:



And here is the second, with a longer tail:


Here is the first, with just a tiny little tail:
And here is the second, with a longer tail: