I have the same thing ,cat comes in my house as the owners are out 14 hours a day and leave the cat out. They dont mind him coming into me for food, but unfortunately the cat now regards my house as home.The owner knocked on my door sunday and said have you seen my cat yes i said hes in my garden and gave it to him. I didnt want an argument but i would like to have said what do you expect if you leave him for all those hours he will find a new home.