Hi Not all cats can be chased away,there was a big bruiser in our area,you would be walking with your dog,and it would followyou tail up(ugly looking thing) you would pet it and it would rub its head,the next thing you know it would jump on to your dog claws out,the only thing I could do was tie the dog to the gate,pickup this cat and put it back in the garden,it wasnt fazed,I have heard that it jumped on a massive GSD and that got an abcess.It was a menace in the area and injured quite a few dogs luckily not mine.Gemini54