Which factor is most crucial for rabbit welfare during hot weather?

Access to shade is indeed the most crucial factor for rabbit welfare during hot weather. Rabbits are sensitive to heat, and shade provides a critical refuge from direct sunlight, helping to regulate their body temperature and reduce the risk of heat stress. Without adequate shade, rabbits can face potentially life-threatening conditions, such as heatstroke, especially in high temperatures.

While heavy bedding can provide some insulation and comfort, it may not effectively cool the rabbit or protect them from overheating in hot conditions. A change of feed can be important for various reasons, but in the context of heat management, it is not as directly beneficial for cooling as providing shade. Similarly, maintaining a dry environment is essential for preventing disease and discomfort, but it does not directly address the need for temperature control and heat relief. Access to shade is the clearest and most immediate solution for protecting rabbits from heat-related issues.