2. 2nd pic is the same chick just after hatch 3rd pic is today at almost 4 weeks old. I was told she is pure Ameraucana where here other 2 hatch mates only share her dad. Do you think this is true? She did hatch from a blue egg.
I see yellow on her legs. With yellow skin over slate (blue/gray), that makes green legs. They will likely show better as she grows. So, I would say, half Ameraucana.