Too clever

When I moved 18mths ago I taped up this cat door in my back door. I thought I had done a pretty good job until this morning. I came back from my shift and realised after a short while that I was minus 2 cats.They had both absconded. They must have spent a good part of the morning with their teeth and claws.I was very scared looking for them, but luckily one of them came to a call. Flynn wasnt having a bar of being shut in house again.Luckily for me a noisy truck went past and he came to me. I have called my handyman and he is coming tomorrow morning to fix it for ever.