When grooming a pony living outdoors without rugs, what should you avoid?

When grooming a pony that lives outdoors without rugs, it is important to preserve the natural oils in their coat. These oils play a crucial role in maintaining the health of the skin and coat, providing moisture and protection against environmental factors. When the natural oils are stripped away, the pony's coat can become dry, brittle, and more susceptible to irritations or infections. This is particularly significant for ponies that are constantly exposed to the elements, as their coat serves as the first line of defense against various weather conditions.

The other options touch on important aspects of grooming as well. For instance, brushing too harshly can damage the mane and cause discomfort to the pony. Exposing the pony to direct sunlight can lead to sunburn or overheating, especially if the pony has a lighter coat. Washing the pony too frequently can also wash away these essential oils, but it’s inherently an aspect of washing rather than grooming per se. However, maintaining the pony's natural oils remains paramount, making the preservation of these oils the most critical focus during grooming.