Hi there, I have 3 white 7-week old pullets. Two I believe are white plymouth rocks (I ordered one but I allowed substitutions on my order and I think I received two). My friend gave me another white bird - same exact age. At first I thought it looked exactly the same as my other two but now I am realizing that the one she gave me has green legs and the other two have yellow/orange legs. I was wondering if this is probably a White Rock or could it be something else? Thanks for your feedback!