How can I introduce a new cat to a multi-cat household?

To introduce a new cat to a multi-cat household, start by keeping the new cat in a separate room for a few days to allow the cats to get used to each other's scents. Slowly introduce them through scent swapping and supervised interactions. Provide plenty of resources like food, water, litter boxes, and hiding spots to prevent conflicts. Monitor their interactions closely and be patient as they adjust to each other.