I have an approximately 6-year old cat. She had kittens on April 18th. The kittens are healthy, eating, etc., but the mother cat is acting strange. She meows almost constantly and it's a very high pitched meow. Even when she goes outside for a few minutes, I can hear her meowing.while I'm inside the house. She's never been extremely affectionate but suddenly she's rubbing up against my leg quite a bit. She's seems to be eating/drinking okay.