Hi guys when would you say is a good time to start giving adult cat food to kittens? Squirrel is 7 months old and seems to be eating loads, is this a good age to change or should I wait til she is older? Also do I have to mix both foods together or can I just change to adult food. She does seem to have a sensitive tum as have tried changing food and she gets the runs. Any advice would be great thanx