I learned to ride at a Morgan show barn. The stalls were consistently trashed, and the horses had to stay in them. Worst thing, I never even learned how to clean a horse's hooves. They had terrible feet, and were often lame.
When the woman went to show at Nationals, her sister came to take care of the barn. She was shocked that I was never taught how to pick out hooves.
I moved barns that same year, and bought a quarter horse. He had sat out in the pasture for years, and he had a very bad abscess in the front part of his left-hind leg from stepping on a rock. Nobody even noticed until he started limping horribly. The first month I owned him, we were just getting that abscess drained and healed (yes...buying him was a shot in the dark!!) My boy will NEVER have that again. It is so important.