My cat has always been a little playful, and she'd occasionally attack your feet if you were walking by, then run away, as play. But since I moved in with new roommates, she's suddenly increased the amount of times she'll attack feet. She never attacks mine, just others. And she's also started hissing sometimes at them, especially if she doesn't get attention while she's attacking the feet. She's only bitten one of them once, so it hasn't been overtly aggressive, just annoyingly aggressive. She doesn't do this to me and if I'm in the room she usually almost always stops. The only day I've been told she hasn't done this is when she had basically an hour and a half worth of play from them. I'm trying to play with her more, once in the morning and once at night, but does anyone have any ideas on what else I can do? I've thought about walking her to get her energy out but I have a broken ankle and it'll be another month and a half at least before I can go walking around outside like that.