Beet pulp, the nutrena, etc, ARE 'hard feed'. Beet pulp is calorie dense, no, not good for weightloss, but as it's relatively sugar/starch free, good for feeding IR horses for weightgain, and OK for a HANDFUL to be mixed with supps to get horses to eat that don't need extra calories. Same for copra, but it's low in calcium & got other goodies - coconut & it's oil is fantastic on so many health levels. If you can't get copra, perhaps a handful of the BP is warranted to get her to eat her 'greens'.
She does get Remission. Is that enough magnesium? She is on 2 scoops a day.
Not going off analysis or anything, but I'd suspect with BP and the high Ca Nutrena, you'd need a LOT more Mg than a maint. dose of that. See Gravelproofhoof
for more on Mg.
What about a vit/min mix instead of a ration balancer?
Yeah, that's what an 'RB' is, although many of them are made in a pelleted form that you can feed straight. If pelleted, make sure it's low dose (eg a handful or 2 daily) and low starch.
I really hate to cut back her hay. I just feel so guilty letting her see her herd mates pig out while she "starves". She's alreaduy quite ****y about getting the 1inch hay nets and her limited rations. The poor girl thinks she's dying.
Get over your guilt & remember not to 'kill her with kindness'. As said, maybe not cut down, but if not, soak & drain to leach out extras, and double net it or such. If your grand dad brought you up on all the junkfood you could eat, then someone suddenly restricted that, you'd probably be '****y' about it too(interesting you're allowed to use that term here, but not with a u instead of i!
). But it wouldn't mean it's a good move for them to feel guilty about it & give you more, especially if you'd already become an obese diabetic & suffering secondary diseases from it.
Another thing with getting '****y'
is that stress also depletes Mg. Exercise would be helpful too, if her feet can stand it, or if you can pad/boot so she's comfortable.
Haven't seen her feet, so of course it may be the vet is right about her 'foundering' purely from bad farriery(must have been relatively long term), but given her obesity & diet history, I highly doubt that isn't a large factor.