What is a common sign of distress in racehorses during training?

Refusing to complete the training session is a significant indicator of distress in racehorses. When a horse consistently stops or shows reluctance to engage in training, it can suggest that the animal is experiencing physical discomfort, fatigue, or psychological stress. This behavior may highlight underlying issues such as injury, illness, or improper training techniques. Trainers must pay close attention to these signals, as they reflect not only the horse's current state but also help to ensure the animal's wellbeing and long-term performance.

Other signs, such as increased energy and excitement, can sometimes indicate a healthy level of enthusiasm or readiness for training. A lack of appetite after training could reflect various factors, including the horse's routine or environmental changes, but it might not specifically indicate distress. Similarly, preferring to run in circles may not be a sign of distress in itself; it could be part of the horse's natural behavior or playfulness, depending on the context. Hence, the refusal to complete training is a more definitive sign of distress that requires immediate attention from a trainer.