We have just got another kitten to keep our first kitten company. Basically we got 2 kittens, one died after a week and we wanted another, but due to a squashed paw and a planned holiday we have only just picked the 2nd up. Pixie is about 16 wks and merlin is about 12 wks, pixie is constantly growling. They seem to 'play fight a bit' but pixie seems very put out, will this calm down? Any suggestions on how we can make sure pixie is happier?