Yep - hens can crow. We had one...the white Delaware hen in my photo. She didn't do it all that often...but one morning she woke us up at 5:30am...crowing, still on her perch. That was too much so we gave her to a local farm that sometimes takes in homeless animals. Incidentally, we had 3 hens, got them as chicks and we never had a rooster. She took on the rooster role. And we're sure she was a SHE because she laid eggs!!!