I bought both of these chicks as Speckled Sussex. The larger, lighter one I believe is a Buttercup. I purchased 11 straight run on May 1st. I purchased the darker one (five total pullets) on May 7th. What do you think? My feedstore guy where I bought the first set isn't much help. He pretty much told me not to worry about it, that "they're just chickens" and "chickens are chickens". Both sets came from Privett and I guess they are basically sold out through June so even if the guy takes them back I can't get replacesments until then.