We have a neighbouring cat who visits us twice daily, and has done since we've been letting our cat outdoors, about 3 months now. It's territorial, and cats will be cats, but he scares our cat. He's big and intimidating. She's petite. When he comes, she runs and hides. But now he's getting braver. We used to keep her food near the back door but had to move it because he would come in and eat it. But now, if no one is around to see, he comes all the way into the house and into the kitchen to find her food. Today we shut the back door to keep him out (despite the heat) and he came in through the kitchen window. I wouldn't be so bothered if our cat wasn't so scared of him, but he hisses at her until she runs away. Suggestioms on how we manage it please?!