My horse is a PIG. She is in for about 14 hours overnight. She pees and poos everywhere, and to make it worse she grabs a bite from her hay net and then goes to look out her window, so she kicks it everywhere! The ammonia smell was awful.
It was being stripped about every 3 days or so, and new bedding added the days in between.
We decided to add some stuff called Sweet PDZ to her stall under the bedding. It is pretty much like cat litter, supposed to absorb. It has made a HUGE difference in how long her stall stays clean, and we only add half a bag per strip.
For other people with piggies like mine, I recommend giving it a shot!