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Sudden aggression in my normally friendly jackie x
Please help my jack russell whom we have owned and loved since he was 8 weeks old and has always been friendly brought up with children and houses full of people has suddenly become randomly aggressive and has even bit on several occassions. It may seem a trivial thing to some but its breaking my heart because I could never ever consider putting him to sleep. I have visited the vets with him and they assure there is no underlying health probs WHAT SHOULD I DO.