I have a very sweet and adorable approx 9 week kitten (stray) she has been to the vet and is luckily very healthy. I've had her for about 2 weeks now. She is so full of life and I'm in love with her. Used the litter box perfect and I don't have any other cats, only a pug dog. My question.. She has been hissing at my boyfriend when he goes to pick her up or pet her. She doesn't bite or otherwise be aggressive, just hisses. She has never hissed at me. She has bonded more with me I've noticed. He's commented about the hissing and I'm not sure why she would do it? He hasn't bumped her or anything, actually I've bumped her on accident and she's not scared of me or anything so I'm not sure what do u guys think?