Which is a key behavior for making Jack Russell Terriers well-adjusted pets?

Socialization with other dogs is a crucial behavior that helps Jack Russell Terriers develop into well-adjusted pets. This breed, known for its high energy and intelligence, thrives in environments where they can engage with other dogs and people. Socialization aids in reducing anxiety and fear of unfamiliar situations, which can often lead to behavioral issues if not addressed. By exposing them to a variety of settings and interactions during their formative months, owners help these dogs learn appropriate social cues and build confidence.

In contrast, isolation from unknown environments does not promote healthy development for Jack Russell Terriers, as it can result in fearfulness or aggression toward unfamiliar situations. Similarly, adopting a strict discipline approach may inhibit positive behaviors, as it often focuses on punishment rather than reinforcing desired actions. Lastly, limiting physical activity does not align with the breed's energetic nature, as Jack Russell Terriers require regular exercise and mental stimulation for their overall well-being.