I always have my big dog inside the house. Also sleep with my weapon and cell phone next to me. Never leave a window open. My house has impact windows which you would have to hit it with a sledge hammer which would only open a small hole. They would have to break two holes and put there hands though to unlock the two locks that the windows have.
The doors are the same. In a SHTF times the criminals will have a weapon and will not stop since they will know you can’t call for help so start planning and prepare.