What might be a sign of an unhealthy introduction to a new dog?

Growling or excessive barking at the new dog can indicate that the initial interaction is unhealthy. These behaviors often signal discomfort, fear, or aggression from the dog that is reacting negatively to the introduction. It’s essential to recognize that a calm and friendly introduction between dogs usually involves positive body language, such as friendly sniffing and tail wagging, as seen in the other options.

When dogs greet one another with curiosity and relaxed demeanor, it suggests a healthy introduction where both parties feel comfortable. In contrast, growling or barking can lead to escalating tensions and potential conflict, making it crucial for dog owners to intervene and manage the situation to prevent negative outcomes.