No 9 weeks is not too young. I just wondered since she was crying so much.

Please be careful with Fenway. My sister had a wire hair terrier and when she kept her daughter's young cat for a weekend he saw Rugby, the cat, run across the basement and got excited and attacked. He almost killed Rugby. It was a surprise to them because my sister had two cats of her own but her terrier hadn't been around younger cats or kittens before.