Is "he" a "she"?

[NewcomerChicken]

When we got him, we thought he was a HE. But, now we're doubting. He/she is four weeks old. He/she, has virtually no comb. He has very, VERY small ridges on his head that you can barely see. His "waddles" are not hanging at all, and are also hard to see. He has less feathers than our other chicks. Is "he" actually a "she"? And what are your reasons?

 

[Aiode]

Hi, I tried looking it up to show some facts but wasn't able to find it. If you googled it, with a focus on why males feather slower then females, you will have better luck than my tired eyes. My personal experience is that males grow slower then females. Tuna fish/ or wet cat food will help with the protein needed for feather development. If it was sold as a male, then it's most likely a male.