Hi Toni,

Frankly a mud lot would be better for Stubby than being out on pasture.  As Kirsten has already pointed out there a number of ways you can make her a safe area with no grass.  Getting her off grass, on a controlled diet and getting her ACTH and insulin under control may go a long way to getting the diarrhea under control.  

Remission is just a very expensive form of Magnesium by the way. You can use MgOx from a feed store and save yourself quite a bit of money that way.