Which type of animal should not be handled without assistance due to potential danger?

Handling fractious animals is considered hazardous due to their unpredictable behavior and potential for aggression. Fractious animals are often fearful, anxious, or in pain, which can lead them to react defensively or aggressively when approached. This behavior can manifest through biting, scratching, or other forms of aggressive actions, making it unsafe for anyone to handle these animals without proper training or assistance.

In contrast, friendly, playful, and calm animals are typically more sociable and less likely to pose a danger to humans during handling. These animals are generally easier to manage and less prone to aggressive reactions, allowing for safe interaction without the need for additional assistance. Understanding the different temperaments of animals is crucial for ensuring safety and effective handling in a veterinary setting.