I have a 13 week old kitten named "boots" that I've had since she was 8 weeks old. Boots is normally very active, running all around the house and playing with my 9 month old cat "naj," all boots has been doing for the past 2 days is laying under the bed sleeping. She doesn't seem to have a strong appetite, and doesn't drink that much water please tell me what you think could possibly be wrong. -nicole-