I have 2 three month old hens, when I bought them as chicks at our local pet and garden place, one was confirmed to be a rhode island red. They weren't sure what the other one was, since it was yellow, but came with the rhode island red shipment. Since then she's grown feathers, but she has some black feathers and is larger than my rhode island red. Thought maybe the chicken experts here could help me figure out for sure what she is.
She's the one on the left in the above picture
She's the one to the right in this one.
Thanks!

She's the one on the left in the above picture

She's the one to the right in this one.
Thanks!