Hello I got Alfie (8 weeks old)on Tuesday, he has settled in so well, he is sat on my knee at the minute. Just been to pick up my Siamese Harvey (13 weeks old) as I was originally only having him, but a friend found abandoned Kittens. At the minute Harvey is hiding behind the couch so I am just going to let him venture out when he is ready and the only time they have seen each other there was a little bit of hissing and Harvey ran behind the sofa. What do I do? let him settle in first, then introduce or just let them see each other and let nature take it's course?