We have two brothers, 12 years old, both tabby and white. We have had problems getting rid of fleas over the past month and the cat in question gets very bothered by them. There is also a cat in the neighbourhood who has been through their flap to eat their food and can display aggressive behaviour. The cat we are concerned about just sits in the front garden and will only come in to eat. If we bring him in, he will literally kangaroo hop back out again. He is also very vocal and makes very urgent cries that go on for ages. He looks in good health, shiny coat etc.Our vet has been hopeless and we're going to register for a new one this week and get some prescription flea treatment. Just wondering if anyone on here's cat has displayed similar behaviour.