Hello i have a persian cat 5 months old and today i take one more persian cat 2 months old.my first cat When she saw the new cat went wild and made 'xxxxxxxxxxxxx' what need I do to coexist two kittens ?
Keep them separate for a while. Keep the new cat in a bedroom with their own food and litter. Then just wait a few days and let them smell each other. Eventually, you can start opening the door and introduce them to each other supervised. It takes time sometimes. Our Isla took about 2 months and now they are all best friends.