I just got a kitten she is about 10 months old and she has already been spayed. She is the most adorable kitten in the world but she has a scratching and biting problem. She will rub up against us and lay down for us to pet her, and she will be purring, but 1 minute into the petting she will start to bite and scratch and I don't know whether it's because she's teething, or because she just has a habit to scratch. Help!!!