Speckled Sussex? Brown Leghorn? Neither? Please Help

[Carter M]

I just got an Araucana, Barred Rock and mystery chick. They are all about 3.5 weeks old and I'm hoping someone can help me identify the mystery chick. Here are some pictures.
In the pictures she is
front and center
to the left
back right
far right
back right

 

[Wyandottes7]

She's either a Light Brown Leghorn or a Welsummer. She's not a Speckled Sussex, since they have whitish legs. If she's a Leghorn, she'll develop white earlobes when she gets older. If she's a Welsummer, her earlobes will become red. Leghorns lay white eggs and Welsummers lay brown eggs.

 

[Carter M]

Thank you so much

 

[BantamLover21]

She's either a Light Brown Leghorn or a Welsummer. She's not a Speckled Sussex, since they have whitish legs. If she's a Leghorn, she'll develop white earlobes when she gets older. If she's a Welsummer, her earlobes will become red. Leghorns lay white eggs and Welsummers lay brown eggs.

x2