Seventeen years ago, I didn't have a clue about introducing a second cat to the household. I brought in an 8 week old kitten named Johnny. Mollie was slightly older, by about 10 weeks. When Johnny came in, he spread-eagled over the food dish, and began eating. The dish was bigger than him. After he ate, he used the litterbox. He then proceeded to play with the toys, but he particularly loved a pink ball with a bell on it. He became a top-notch fetcher, self-taught. I realized what a disservice it had been to Mollie to drop that gregarious kitten into the house without introducing them properly. Thank goodness they became great companions in spite of my naivete about introducing territorial animals. Sadly, Johnny was euthanized due to poor health a little over 2 weeks ago. Mollie is still here mourning the death of her "brobro". I was lucky they liked each other almost immediately, because I've heard that sometimes cats that aren't introduced properly might never get along.

Great tips