Before introductions, have both pets checked by a vet to ensure they're healthy and free from diseases.
Use a bathroom with a closed door to prevent escapes.
Swap soft items between rooms daily so they get used to each other's scents.
Feed them on either side of a closed door, associating each other with positive things like food.
Allow the new pet to explore the house when the other is away.
Train your dog basic commands like "Stay" and "Come."
Use pheromone sprays for cats (Feliway) and dogs (Adaptil) to ease stress.
Arrange a meeting in a neutral area while your dog is on a leash. Reward calm behavior.
Use positive reinforcement to reward both pets for calm and friendly interactions.
Repeat meetings until they are comfortable around each other.