Introducing two dogs to each other when moving in together for the first time can be a crucial step in ensuring they get along well. Here are some tips to help you facilitate a successful introduction and promote a harmonious relationship between the dogs:

1. Choose a neutral territory: It's advisable to introduce the dogs in a neutral location, such as a park or a friend's yard, where neither dog has established territory. This can help prevent territorial conflicts and reduce the chances of one dog feeling threatened.

2. Controlled on-leash introductions: Keep both dogs on leashes during the initial introductions. Allow them to approach each other gradually while observing their body language. Look for signs of relaxation, such as loose wagging tails and relaxed postures. If either dog shows signs of aggression or discomfort, separate them and try again later.

3. Positive reinforcement: Use treats and praise to reward both dogs for calm and friendly behavior during the introduction. This positive reinforcement helps create positive associations with each other's presence.

4. Gradual exposure: After the initial introduction, gradually increase the dogs' exposure to each other. Start by short supervised visits and gradually extend the duration as they become more comfortable. Monitor their interactions closely, intervening if any signs of aggression or tension arise.

5. Separate spaces and resources: During the initial stages, provide each dog with separate spaces, such as separate rooms or crates, where they can retreat and have their own belongings. This allows them to have their personal space and reduces the likelihood of conflicts over resources like food and toys.

6. Supervised playtime: Once the dogs are comfortable around each other, allow them to have supervised playtime. Observe their interactions closely, ensuring they play in a friendly and appropriate manner. Interrupt any rough or overly assertive behavior to prevent escalation.

7. Maintain routines and individual attention: Continue to provide individual attention and maintain regular routines for both dogs. This helps them feel secure and reduces the chances of jealousy or resource guarding behavior.

8. Seek professional help if needed: If you encounter significant challenges or persistent aggression between the dogs, consider consulting a professional dog trainer or behaviorist. They can provide personalized guidance and assistance in managing the situation effectively.

Remember, every dog is unique, and the introduction process may take time. Be patient, remain calm, and prioritize the safety and well-being of both dogs throughout the process.