I have a Singapura breed which is of South East Asian decent and I was wondering if it is normal for her not to hiss. Catnip has no affect on her as I read that this is a hereditary trait and very common for cats of Asian decent to have no reaction to catnip. I've had her 2 months and she's never hissed - I even got this toy called the play paw which I put over my hand and arm and she attacks and plays with but is yet to hiss. Is this normal that she does not hiss or has she just had nothing to hiss about. She meows constantly but never hisses. Any idea if this is normal?