Some people can squeeze through really small openings. I remember a gas station that was burglarized in the 1960's, the guy knocked out a single "cinder block" from the wall and squeezed through that opening. I don't doubt that some scrawny kid couldn't squeeze through a large-sized doggy door, in fact I think I've seen a video of it actually happening.
Here's a recent story............AND WHERE WAS THE DOG DURING THIS?
A 21-year-old Shreveport man was arrested Friday after he was captured on video using a doggy door to enter a neighbor's home.
Timothy Sepulvado admitted entering the home several times over the last few months, stated a news release.
After noticing several items out of place a missing in her home, the homeowner set up a camera that caught Sepulvado entering the house through a pet door and walking around in the house while the homeowner was at work.