The grazing muzzle (I have no way to separate her from the others to use a slow feeder net, so muzzle will have to do), is now permanently affixed to her face. She can eat all day long, just not a whole lot. Hoping that will cut enough calories. She WAS being fed alfalfa and grain, in a group setting, so was getting more than her fair share. Since none of the others was looking like they had missed any meals, I'm saying just all of them were being overfed.
Here are 2 more from the same herd, neither looking particularly ribby:
I did the grazing muzzle for my gelding he still got super fat last winter. He's a air fern gains weight looking at hay.
The grazing muzzle didnt trim him down I swear he gained weight,that was when it was 20 and 30 below zero. His being fat caught up to him endedup laminatic this summer and is now IR.