I agree with Bee. I am loathe to spend the money to purchase chicks on a regular basis. But, there is room for plenty of management styles. And I would call this management, in that the older birds are removed from the flock to make room for replacement. Lack of management IMO involves never removing the old birds, and being left with a geriatric non-productive flock, or an overcrowding issue b/c the owner keeps adding young birds but never removes the old. And not everyone can have roosters. In this case, they are left with the necessity of having to purchase chicks. Even if one is hatching their own chicks, they need to eventually bring in more blood. My plan for that is to bring in hatching eggs, to lessen the risk of disease. Also, it seems reasonable to me to hatch more chicks than you need, so that you can cull vigorously during the summer. The summer flock should be able to support larger numbers than the winter flock, unless your coop space is maxed out with just your "skeleton" crew or flock. Call me a nay sayer, but I believe the day is coming when it will be increasingly difficult to buy replacement chicks.