My elderly neighbour, who has two cats, woke up last week to find a large, strange ginger tom lying in bed next to him. After it had eaten all the cat food in the house and terrorised his other cats he phoned the vet. He said that it belonged to a woman at the top of our estate who had paid £2000 for a pedigree ginger tom.
You see, that's the danger of catflaps, you never know who or what you're letting in to your house.