She's 4 nearly 5 months old now and still gets aggressive now and again to the extent my partner and I have marks on our hands ! We love her go pieces and she can be so loving ! Always greets us at the door, jumps on our shoulder and sleeps with us but now and again she will attack us for not reason ! Hissing at her started to work but now she doesn't seem to react to it ! She is getting spayed in a couple of weeks not sure that will make a difference ! She aggressively attacked my partners arm the other night and he is talking about just letting her out one day and making her fend for herself to teach her a lesson ! She's an indoor cat as we live on a highway ! And she got scared when I took her in the garden on a leash once and ran to come back indoors! We do hope she grows out of it and call Her the little shark when we find her trying to stalk us but what she did to my partners arm was just spiteful ! We've had her since she was 6/7 weeks old and I love her and don't want to let her out and be harmed out there !