It's really important to have good horse bedding in a barn. Make sure it's nice and deep. Use good quality wood shavings. Remove soiled bedding from stalls daily and replace with fresh bedding. Do not use shavings that come from black cherry or walnut wood. These shavings can make a horse founder.
Bedding should be absorbant, non-toxic, dust-free, comfortable to horses, available and affordable. It should be stored in a dry place.
Providing your horse with the best possible environment gets you closer to achieving your horse goals.