What's up with my hen?

[Wyandotte Momma]

So fist off let me tell you about Henry my Wyandotte that was thought to be a rooster. Well she was no rooster. But she crowed once I swear I herd a clear crow. Then a few weeks later she started laying eggs. Now she has refused to lay. And we got her on layer feed and all. We got some chicks and introduced her to them and all was fine she was laying when they were around but now she has Stopped. Any suggestions?