What are the best ways to introduce a new pet into a household with existing pets?

When introducing a new pet to a household with existing pets, it is important to do so gradually and carefully. Start by keeping the new pet in a separate room to allow the animals to get used to each other's scents. Slowly introduce them through scent swapping and supervised interactions. Monitor their behavior and provide positive reinforcement for good interactions. Patience and consistency are key in helping the pets adjust to each other.