The time it takes for dogs to get used to each other can vary widely depending on several factors, including the dogs' personalities, past experiences, and the introduction process. Generally, it can take anywhere from a few days to several weeks for dogs to become comfortable with one another. Here are some tips to help facilitate their introduction:

1. **Initial Introduction**: Start with a neutral location for the first meeting. This can help prevent territorial behavior. Allow them to sniff each other while on leashes, maintaining a calm demeanor.

2. **Positive Reinforcement**: Use treats and praise to reward both dogs for calm behavior during interactions. This helps them associate each other with positive experiences.

3. **Short Interactions**: Keep the initial meetings brief. Gradually increase the duration of their time together as they become more at ease.

4. **Supervised Play**: Once they seem comfortable, allow them to play together under supervision. Watch for signs of stress or aggression, and intervene if necessary.

5. **Routine and Structure**: Establish a routine that includes both dogs, which can help them feel more secure and reduce anxiety.

6. **Individual Attention**: Ensure each dog receives individual attention from you to prevent jealousy and to strengthen your bond with each dog.

7. **Time and Patience**: Remember that every dog is unique. Some may take longer to adjust than others. Be patient and allow them to set the pace.

In summary, while some dogs may bond quickly, others may take time. The key is to ensure a positive, controlled introduction and to be patient throughout the process.

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Topics covered in this question:

Dog Behavior Dog Training Pet Care Canine Socialization Dog Introductions