Why should the dandy brush be avoided on the mane and tail?

Using a dandy brush on the mane and tail is not advisable because it is designed with stiff bristles that can be too harsh for the delicate hair in these areas. Over time, using such a brush can lead to breakage and damage to the hair shafts, resulting in a rough, unkempt appearance. The mane and tail require more gentle handling to maintain their health and integrity, and softer brushes are typically recommended to avoid causing injury or stress to the horse's skin as well.

Considering the other options, while a dandy brush may not be the most effective tool for long hair and could theoretically collect dust, the key issue with its use on the mane and tail focuses on the potential for hair damage. It's also important to note that while dandy brushes have various uses on the body, they are not designated solely for cleaning hooves, highlighting why this brush's texture is unsuitable for more sensitive areas.