The worst place I was at was a place that was Semi care. My boarding cost covered the stall, use of the indoor arena, shavings and hay. I had to provide any grain and I had to clean my own stall. They did all the feeding and turning out. When I first started boarding there my bag of grain would last about a month. By the time I left I was going through a bag every 2 weeks so I know the owner was using it for her own horses. Also They started taking shavings out of his stall after I left. I don't over do it on shavings the woman was just being stingy. I also found out that if I was there for the night feed he would get his 3 flakes of hay. The moment I left she would go in and take half back out.
I came up one day after dinner and found him pacing in his stall. He paced so much his shavings were banked against the sides of his stall. She decided not turn him out in two days and in that two days he had maybe 6 flakes of hay total. I got out of there very fast. Sadly I was worried about her feeding my horse as all and did not give any notice.