I can't figure this one out.. I have a kitten who is almost 9 months old. When my nephew is here he jumps on his head and attacks him. Not playing actually trying to hurt him. I did get this cat from my sister so for the cat's first 7 weeks (don't ask.. my sis is not good with animals) he grew up with my nephew. My husband thinks the cat remembers my nephew being rough with him.. Now my sister still has two cats at her place so maybe he smells the other cats? I have no idea why this cat does this. I feel bad for my nephew who is 4 because he certainly doesn't deserve to be scratched. Does anyone have any input?