I have a question. For the past 30 years I have lived here, we have only had red squirrels at our bird feeders.. This past winter we have had some gray ones show up. Is this something I should worry about. I have about 7 acres of mature pin and red oaks that they are living in. I don't know if they will present a problem or not. Both red and gray are at the feeder at times. They seem to get along.