I have a 7 week old kitten who I "rescued" from my backyard. He used to have two sisters, who had brain related issues and unfortunately passed away in the last 2 weeks. Now he cries and whines constantly, no matter if he is eating, playing, or lazing about. In the last few days, he has taken up SPITTING at me! I don't want him to hate me, thinking i took his sisters away, am I doing something wrong? He has never spit before, but he straight up charges at me from across the room, stops a few inches short, and spits (or sometimes hisses). Is this normal?