If your horse lives in a stall for any part of his day, you'll have to keep it clean.
The tools of the trade.
Photo 2006 K. Blocksdorf
Unclean stalls attract insects and could encourage hoof problems like thrush. Breathing ammonia from urine saturated bedding can be harmful to your horse's or pony's sensitive lungs. It's unpleasent to work in and smelly for you too. Stall cleaning should be a daily task. It's not the most exciting part of horse ownership. But it is good exercise. Here's how to get the job done - How To Clean a Horse Stall Step-by-Step
More About Stalls and Bedding