Her coloring looks a little different than my brown leghorn babies have been. Their eye stripes have been very distinct, and your baby's eye stripes don't look quite the same as mine have. But she could be... I'll post a pic of one of my brown leghorn babies for you to compare. Is she rose combed or single combed?
This is 12 days old:
And this is 2 days old:
This is 12 days old:
And this is 2 days old: