How much turnout does she get? Does she have free choice access to hay?
Turning her out longer, at least 8 hours, (or even leaving her out 24/7, solving her stall anxiety..) is healthier and means she has less time spent in her stall and gets more exercise. Free choice hay in the stall (the most economical way is in a small mesh hay net) will help keep her occupied and is healthier- unless their hay needs to be restricted for a health issue.
“Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen.” - Unknown