10 month old kitten with 3 month old kittwn

Hey. I have a 10 month old himalayan, Larry, who is the sweetest kitten. Larry follows me everywhere, loves to cuddle,and sleeps with me. We brought home a 3 month old himalayan 4 days ago.

I have done lots of research prior to bringing home the new baby. The new kitten has his own room with toys, litter box, food/water and has been doing well. He's very friendly active and adjusting well. He is dying to get out of his room.

Our resident cat, Larry is not too fond of the kitten. I have been doing scent swapping and feedings at the kittens door. Both went well. I brought the new kitten into another room and let Larry into where the kitten has been staying. Larry hissed just upon entering the kittens room and left. Since scent swapping and feeding both cats at the same time with each on a opposite side of the door has gone well, I was surprised his reaction to just going into the room he hissed.

Larry has been sitting outside the kittens door just listening and seems ok doing this. Today the kitten and Larry were smacking each other's paws underneath the door. I'm afraid to let Larry see the kitten since he hissed at just his empty room. I don't want to stress out either one. Larry seems more withdrawn at times which isn't himself. The new kitten want a out of his room and I feel bad I can't let him out besides just quick exploring while I put Larry in another room. I just hope I am doing everything I can correctly so they both are comfortable.

Any opinions/suggestions/advice? I just let the two cats see each other through the door a little. Larry hissed a few times. I gave them both treats.

I think it's going well for 4 days!  Be patient with them. Its not unheard of for cat introductions to take even a few months before they are settled in together.  The key really is to just follow their lead and not rush them.     If you try to move on to the next step and it doesn't go well; step back for a few days.  It's worth it in the long run.  But really I think it's going well so far.  Keep scent swapping and space swapping a bit too.  And feeding near the door.  It might seems a little tedious right now; but once things have a chance to settle it won't seem nearly so bad. 

Welcome to TCS!   

Hi Moochnnoodles!

Thank you for your encouragement and advice. I have always been a one cat household so this is new to me and my husband. They have been doing well eating together one either side of the door. They were batting at each other's paws underneath the door yesterday. I opened the door a little (small enough to not get out but able to see each other) and let them play with a string like toy together. They did well. Then I put a baby gate between the two and let them play with the toy again. Our resident cat hissed a few times but didn't run away and stayed by the baby gate and played with the toy with the new kitten. I also let our resident cat explore the kittens room while I put him in my bedroom. No hissing while in the kittens room this time, just sniffed at his toys, food, litter box, etc. So I guess that is progress and to keep continue with what I am doing? I worry about the hissing. It doesn't seem excessive, more occasional. I don't want to make either cat feel uncomfortable.

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