Cosmos is on a recovery diet right now. Four years without ridden work, and this spring he lost a serious amount of weight on top of that. Eighteen is already a significant age for a horse — the body starts behaving differently than it used to, and the diet needed a full rebuild, not a tweak. On top of that, hay in our region is fairly poor quality — even the stuff that looks decent often doesn't deliver what it should.
When I decided beet pulp would be the backbone of his recovery diet, people started trying to talk me out of it. One piece of advice was literally: feed him corn, because "we've had a few horses put on weight fast that way." An eighteen-year-old, unworked horse. As for beet pulp, mostly what I heard was skepticism — that it's a cheap filler, not anything genuinely valuable.
So, I stuck to my guns: beet pulp is a superfood, and I'm ready to back that up with facts.
Beet pulp is a byproduct of sugar beet processing. What makes it interesting is the sheer amount of soluble dietary fiber in it — mostly pectins, around 20% of dry matter — with almost no starch or lignin. Pectins get almost completely fermented by the microflora in the hindgut, producing volatile fatty acids — essentially clean energy. And studies show that beet pulp's non-starch polysaccharides disappear through the GI tract more efficiently than hay or oat hulls do.
The main advantage: energy without starch. The classic problem with most rations is too much starch from grain, which doesn't get digested in the small intestine and ends up in the hindgut instead. There it ferments rapidly, drops the pH, and kills off the normal microflora. The result: dysbiosis, colic, laminitis. Swapping part of the grain for beet pulp cuts that starch load dramatically without losing digestibility. Energy-wise, beet pulp is comparable to a lot of grains, which makes it a solid "fiber" alternative for lowering colic risk.
For Cosmos, that's exactly what he needs: calories without a starch load on a gut that isn't as young as it used to be. Here's what's currently in his ration:
✅ Oats — about 300–350 grams of whole oats a day. There's starch in there, so the portion is strictly measured. Piling on more starchy feed on top — whether more oats or, worse, corn — isn't an option.
✅ Beet pulp — 1 kg a day (the actual backbone for energy and gut health).
✅ Wheat bran — about 150–200 grams of pelleted bran a day.
✅ Sunflower meal — 0.5 kg a day (I'd happily switch to flax meal, but it's temporarily unavailable from suppliers).
✅ Vegetable oil — 100–300 grams a day.
Once it gets cold, I'm also planning to add alfalfa pellets (or mixed-grass pellets if that's not available) and an herbal supplement — I'll cover what's in that separately.
Low glycemic response — and that's not a nice-to-have, it's a necessity for horses with metabolic issues. Unmolassed beet pulp shows a tiny glycemic index, right in line with hay, while grains and corn send it way up. Swapping grain for beet pulp smooths out glucose and insulin spikes — the sharp swings just disappear.
Important caveat here though: nearly all of these benefits apply to beet pulp without molasses. Molassed beet pulp is loaded with sugar (sometimes 20% or more), and its glycemic response can end up significantly higher than legume hay or even grain. So for older horses like Cosmos, you need either unmolassed pulp, or pulp that's been rinsed and soaked to strip out the sugars.
Beet pulp is also great at holding water and swelling up. Soaked, it adds extra fluid to the diet — which for an older horse with less-than-ideal drinking habits is a real plus. On top of that, pectins help keep the hindgut pH stable.
Now, what beet pulp doesn't do — and where the skeptics have a point.
It's not a hay substitute. Ever. Beet pulp doesn't provide the long chewing time or stimulate saliva production the way long-stem hay does. Free access to hay is the foundation of any ration, and you can't replace a significant chunk of it with beet pulp — especially with hay as poor as ours.
Corn, though, which is what I was pushed toward instead of beet pulp — that's the actually dangerous option. Corn is a high-starch feed with a brutal glycemic index. Feeding it to an older horse is a direct route to metabolic trouble: dysbiosis, insulin spikes, laminitis. Sure, a horse on corn will probably gain weight fast. The question is at what cost. Gaining weight isn't the goal in itself, not if you're trading it for a pile of new problems.
Protein in beet pulp is also low — around 9-10% crude protein, and it's less digestible than what you get from grain. So the ration has to be balanced for amino acids separately, which matters a lot for Kosmos right now — he needs to rebuild muscle, not just put on bulk.
Choke risk is real. Dry pelleted beet pulp is highly hygroscopic and can swell up fast in the esophagus or gut, leading to a blockage. Soaking it until fully softened isn't overcaution — it's non-negotiable. Dry pulp needs to be completely out of reach. Though to be fair, some commercial feeds do include it unsoaked, but only in small pellets and a very small percentage of the overall mix.
Minerals and vitamins are also thin on the ground, and pectins bind calcium on top of that. Building a ration around beet pulp alone, with no balancing, is a guaranteed path to deficiencies.
So — superfood or not? I think yes. Beet pulp ferments beautifully, delivers energy without acidifying the hindgut, keeps blood sugar steady, and generally supports gut health — and let's be honest, most stalled horses have had gut issues going back practically to weaning. For a horse with Cosmos's situation, it's one of the few feeds that actually solves several problems at once. And it's a far smarter call than piling on more grain or corn.
But "superfood" doesn't mean "miracle cure," and it definitely doesn't mean you get to stop paying attention. It's just a good tool — one that requires proper prep and decent hay alongside it to actually work.
What do you supplement your horses' diets with for the off-season or weight gain? Drop it in the comments, I'd love to compare notes.