We are very, very careful that no one gets out. We do loss a cat in the house every once in a while. We lost Boots for almost a week. Could not find her any where. Then there was a noise in the attic. We have pull down stairs. SPOTED. Since we are still working on the renovation there is no ceiling up stairs, just insulation with a plastic sheet. She found a way up through one of the closets. Since Boots is semi-feral there is no way she would come or answer when called.
It keeps us on our toes.