Sky came in skinny because he didn't travel well and he was skinny to begin with.
The barn gave him 24/7 hay and up to 2 scoops of grain (most horses eat one) and within a few months, he was a good size.
Board didn't change, they claim in their services that any feed comes with the board cost. They set the bar high so they can afford all the luxaries, which I'm fine with.
If you find yourself stopping short, talk with the owner and maybe up the bar a little so everyone that comes in can afford whatever diet their horse needs.
Just my opinion.