I want to urge everyone with indoor cats to make sure your window screens/screened porches have very secure screens. Within 10 minutes of letting my two cats on the screened porch, they broke through the screens today, probably to chase a critter. I was lucky to find one in the yard, but the other is still missing.
I'm heartsick. Please don't think your cats can't get through. Don't make my mistake. I assumed my screens were okay because they looked okay. Carefully check and feel all your screens often!