Tell her she's ribby and she needs more hay, NOW. You're paying to board this horse. She should be getting all of the food she needs to stay at a healthy weight. Horses only get hay bellies if they're getting more hay than they need to keep up their weight, or they're feed a lot of hay that has poor nutritional value.
I've tried...I even called the vet recently and had him confirm that she can have a couple more flakes a day and be fine! It's getting slightly better, she's now not out of her hay until past 8pm so that's an improvement...but she's probably out by 10pm and doesn't get any more until like 6 or 7am the next morning still :(
I want my own place SO BAD!!!!!!!!!!!!!
"The times when you have seen only one set of footprints in the sand, is when I carried you..."