Hi everyone, I have 4 chickens that are between 4-5 months old, two Isabrowns and two Australorps. Recently, one of the Isabrowns started crowing early in the morning! Now, one of the Australorps is also crowing, at all times of the day! What is going on? None of the chickens are agressive and definitely not roosters, and none have layed a single egg yet. This is the first time I've kept chickens, and I'm confused!