Which symptom is associated with laminitis?

Heat in the hooves is a primary symptom associated with laminitis, a serious condition affecting the hooves of horses. When laminitis occurs, inflammation and damage develop in the sensitive tissues of the hoof, leading to an increase in temperature in the hooves. This heat can often be detected by feeling the hooves, which may feel warmer than normal to the touch.

The other symptoms listed, while they may be indicative of different conditions, do not specifically pertain to laminitis. For instance, restlessness can be a general sign of discomfort in many conditions, not just laminitis. Nasal discharge often suggests respiratory issues rather than a hoof-related problem, and dehydration can indicate a range of health issues unrelated to laminitis. Thus, the presence of heat in the hooves is a key indicator of laminitis, establishing the correct answer.