A one-way door for squirrel removal is an effective method that allows squirrels to exit your home or property while preventing them from re-entering. This device is typically installed at entry points like attic vents or openings in eaves, enabling squirrels to leave in search of food or shelter but not return. It's important to ensure the squirrels have left the area before sealing up the entry point permanently to avoid trapping them inside. Additionally, keep in mind local wildlife laws regarding the removal and handling of squirrels to ensure humane practices.