Integrating Koda with Kiki

Hi everyone. I just brought home Koda, a 1-year-old mixed breed, and I'm feeling really overwhelmed. He is currently in my office with his own litter box and food, which feels safe, but I'm worried about how to introduce him to Kiki. Kiki is a 5-year-old Siamese and has significant anxiety issues; she hisses at the door when she senses movement. I read that slow introductions are key, but I'm not sure how to gauge when it's safe to open the door. I've been following Koda's first week update for his settling in, but I need specific advice on the interaction phase. Any tips on preventing a fight?

Hello Kristen. It is important to proceed with patience. Before any visual contact, I recommend you try scent swapping. You can find detailed instructions in my thread Scent swapping that actually works. The idea is to let them smell each other through a closed door using towels. If Kiki is hissing, she is not ready for face-to-face interaction. Please do not rush this step.

yo, keep 'em separated for meals too. i had issues with my cats fighting over food when i first got ivy. check out this thread on Feeding strategies for multi-cat households. it saved me a lot of stress. also, make sure koda has a high perch in the office so he can watch kiki without being in her space. cats like that.

Oh my god, I am so sorry you are going through this. I have two cats, Leo and Mia, and Leo is a total nightmare when it comes to new animals. I remember when I brought Mia home, I thought everything was fine because Leo was just staring at the wall, but then he attacked her three days later! You really need to watch for subtle signs. I found this list of Subtle signs of stress in cats super helpful. Look for dilated pupils, flattened ears, or even just a stillness that looks like 'freezing.' If Kiki is doing any of that, close the door immediately. Do not let them interact until they are completely relaxed around the scent.

Kristen, you are doing the right thing by isolating Koda. Many people make the mistake of letting the new cat roam the house immediately. I wrote about this in my thread on Introducing a kitten to a senior cat, though Kiki is not a senior, the principle of controlled access is the same. Ensure Koda has a dedicated safe room where Kiki cannot enter. This reduces Kiki's sense of territorial violation. Also, consider using a pheromone diffuser in the shared hallway; I discuss the pros and cons in Pheromone diffusers: helpful or hype?. It may help calm the environment.

Thank you all for the detailed advice. I will start the scent swapping today using the towel method you described. I noticed Kiki was twitching her tail when Koda meowed, which I think is a sign of stress. I will keep the door closed for another few days. I am also going to set up a diffuser in the hallway as Karen suggested. I will update this thread when we move to the visual phase.