How do I introduce 1 kitten and 1 adult cat to a Siamese cat?

Question

I recently got one adult cat and one kitten. I have a 13 year old Simease cat how do I introduce them. I have tried it and the simease cat gets really mad. We think we are going to have them be house cats. HELP!

Answer 1

put all of them in a small area and they might bond.

Answer 2

I used baby gates.  High enough so that neither could jump over the top but they still have the ability to see sniff and hiss at one another and then gradually while supervised I would open the gates and let them wander in each others space.  Couple of hours at a time and then the gates would go back up.  It took me approx 2.5 weeks to get them totally acclimated with each other.  But now they sleep together!