My little Chesney is now just 6yrs old. I'm a dermatologist but underwent general medical training. Tonight I could detect a systolic murmur when I auscultated his chest. I have never picked it up before. I am very worried that this may be significant. I will contact the VET tomorrow and try and get him seen next week. I know that murmurs are very common in this breed and he is asymptomatic at present but I am very worried. Any further info would be helpful. He is otherwise fit and well and in the past he did suffer haemorrhagic gastroenteritis and responded very well to treatment. He is not overweight, has 1/2 tray of nature diet every day and milky biscuits as treats and he gets regular excerise, despite the dark nights.