Hi all! I currently have a 1 year old ginger boy and am introducing a new black female kitten. My boy loves so cats and I will regularly come home to him and a friend relaxing on the sofa (we have a cat flap) I'm just worried introducing a new kitten in case she is really aggressive or boisterous. Any tips for first fee meetings?? Also worried hell nof take to his cat flap being shit while we are out in order to make sure other cats dont wonder in around nee kitten. Thanks:)