The link above leads to a Dallas chimney cleaning company that specializes in not only removal of wild animals but also chimney cap sales and other quality household services to keep your home safe from wild animals and your chimney clean.  They will travel over an hour in and around the Metroplex to give a quote so don't hesitate to call, even if you feel you just need a free consultation on your property with winter coming up.  This includes the literal truth to a lot of mistaken conclusions about wildlifre help in the Dallas area.