Don’t let two cats share items, such as food bowls, toys, and cat litter boxes; owners can spend more time with the two cats and play with them to encourage them to establish friendship; in addition, when a new cat first enters the home The owner isolates him, firstly, to allow the new cat to adapt to the new home, and secondly, to allow the old cat to adapt to the addition of a new partner, so that they can adapt to each other.