Hopefully your homes chimney looks similar to this one!
If not you might let in some unwanted critters coming to say hello! Get your homes fireplace and chimney cleaned and inspected to make sure they are safe to use, and the caps are in good shape too! Your homes air ducts could use an inspection too! State of the art video monitoring systems can check them out and see if you are due for a cleaning! www.royalextremeclean.com