Flying squirrel invasion

[chasedawg]

Now that we have gotten rid of the mice we now have flying squirrels in the attic. Tried using Have a heart cage and Ultrasonic pest defenders. Haven't work so far. Concerned that there is a nest with babies being born. What else should we try? We think that they are coming in down the chimney flue. Need to get rid of them before we close up in about 3 weeks.