Here's why:
* Hormonal changes: Pregnancy in dogs can make them more protective, territorial, and even aggressive.
* Competition and resource guarding: The pregnant dog might become more possessive of food, toys, and sleeping spots, which could lead to conflict.
* Unfamiliarity: Dogs that haven't been properly introduced and socialized may react poorly to each other, especially during a stressful time like pregnancy.
* Stress and anxiety: The pregnant dog might be more stressed and anxious, which could lead to aggression.
However, it's not impossible:
* Early and proper introduction: Introducing the dogs gradually and calmly is key. This includes supervised interactions, neutral spaces, and plenty of positive reinforcement.
* Positive reinforcement training: Training both dogs to respect each other's space and boundaries is vital.
* A calm and supportive environment: Providing a safe and comfortable environment for both dogs can help reduce stress and aggression.
Important Considerations:
* The individual dog's personality: Some dogs are naturally more tolerant and adaptable than others.
* The breed's temperament: Certain breeds are known for being more independent or aggressive.
* The owner's experience: Experienced dog owners may be better equipped to handle potential challenges.
It's crucial to consult a veterinarian or a certified dog trainer for expert advice on introducing dogs and managing potential issues during pregnancy.
If you're unsure about whether your dogs can safely coexist, it's best to err on the side of caution and separate them.