I found an orphan kitten when she is around 2 weeks old. She is now 5 weeks and my older cat (16 years old) does not interact with her. The little kitten is bitting and scratching a lot. After Google up some info about "single cat syndrome", it seems like it would be bad for the kitten's behavior development to keep her by herself. I can't really get another young cat. 3 is just way too much and my husband will not be too happy... Any suggestions?