No sign of new feathers (I don't think) - It does seem to have an upright stance compared with the other hens (different breeds)
We think its between 14 - 16 weeks old.
Here's a couple of pictures of her legs - second photo showing the Wyandotte next to the Light Sussex.
Is the leg colour related to the gender? Or breed? She's a backyard chook so we're not bothered at all.
Thanks for the comments.