6 Best Fat Supplement For Senior Horses | 99% Fat vs 50% Fat

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The pure-fat powerhouse that delivers double the energy of grain without the sugar spike.

If your senior horse is a genuine “hard keeper” — the kind that eats everything in sight but still stands ribby — this is the supplement to try first. At 99% fat, Cool Calories 100 has a higher fat concentration than the Farnam product (50% fat). That means a smaller scoop delivers the same calorie punch, which is a lifesaver for a horse that is starting to leave feed behind. The supplement is a dry pellet that owners mix into wet beet pulp or a soaked ration.

The real-world result owners keep coming back for is the “bloom” — that shiny, sleek coat and filled-out topline. One buyer who has used it for years on a 36-year-old horse says it keeps her at a “healthy weight.” The product also contains fatty acids aimed at skin and coat health, and palatability feedback is high; horses that turn their nose up at other supplements readily eat this one. Owners mention it covers the taste of other medications, too.

The catch is the 8-pound bag size. Because you feed a much higher fat percentage, the volume per serving is smaller, but the bag is still smaller physically than the Farnam bucket — you will reorder more often. Some owners also note that the extremely high fat content can cause loose manure if introduced too quickly, so a slow transition matters.

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The crumble that one owner calls “the only answer to weight gain” after years of failed attempts.

This supplement from Formula 707 (made by the John Ewing Company, a Colorado-based equine nutrition house since 1948) takes a slightly different approach than the straight-fat products above. It uses vegetable fat for easily digestible calories and adds high-quality protein to target muscle building. The result is weight gain that also fills out the topline — “gained about 50 pounds along her top line and butt cheeks,” one owner notes partway through the bag. The crumble form is not a pellet, which matters for seniors with worn teeth who struggle with hard feed.

The strongest owner evidence is a five-star review that says “this is amazing stuff, help put weight on a senior horse that I have struggled with for years.” That exact phrase — “struggled with for years” — comes up repeatedly. The fiber component helps keep the gut moving smoothly in horses prone to impaction colic. The 7-pound bag is lightweight and easy to handle compared to the 22.5-pound Farnam bucket.

The honest trade-off is serving size. At a 4-ounce serving, a 7-pound bag lasts roughly 28 days, so you are reordering monthly. And a small number of owners note that the crumble texture can be dusty at the bottom of the bag.

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The compact bag that puts an instant shine on a senior’s coat while gently filling out the frame.

DAC Bloom has a smaller footprint — 5.07 pounds — but a loud reputation for coat quality. “Love how shiny it makes my horses. Smells good enough to eat myself” is a typical owner line, and the customer consensus backs it up: coat quality is the second most-mentioned positive aspect of this product, right behind overall effectiveness. This supplement works particularly well as an addition to a senior’s diet when paired with DAC’s oil product, though it stands alone as a fat supplement for weight gain too.

Senior horses that have lost condition often show it in a dull, dry coat before the ribs become prominent. The feedback from owners of older mares is that Bloom brings back the glossy sheen they remember from the horse’s younger years. The product is described as very palatable for picky eaters — a common challenge with aging horses that have become finicky. The serving size is small enough that the 5-pound bag stretches respectably, though it will not match the 90-day supply of the Farnam bucket.

The most honest downside is that while it supports weight gain, it is not the densest calorie source available. If your senior horse is genuinely emaciated and needs rapid weight correction, a higher-fat product like Cool Calories will deliver faster results. This is more of a maintenance and polish supplement for a horse that is holding its own but could use a boost.

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The family-factory supplement that fills out older OTTBs and senior hard keepers with topline and energy.

Pennwoods Equine Products is a family-owned operation based in Centre Hall, Pennsylvania, and they make Body Builder 4000 in small batches using locally sourced ingredients. The formula is designed around a calorie-dense, high-fat profile that avoids excess sugar and starch — exactly what a senior horse with a touchy gut needs. Owners of older Thoroughbreds and former racehorses (the classic “hard keeper” OTTB) report that it fills out the topline and restores energy on a surprisingly low serving. One buyer describes feeding two scoops to every horse, young and old, mixed into soaked beet pulp, and seeing improved hair coats, hooves, and body mass.

The 11-pound bag sits in a useful middle ground: heavier than the 5- or 7-pound options but much lighter than the 22.5-pound Farnam bucket. The family business angle also resonates with owners who want to support small-scale American manufacturing. The main feedback from the owner community is that the product works — body condition, weight, and quality all score well — but the price point is higher per pound than some alternatives. One owner calls it “good stuff but way overpriced,” comparing the cost to plain flaxseed powder.

The value question is real. You pay a premium for the small-batch, family-made positioning, and the fat percentage is not listed as high as the 99% Cool Calories. For a horse that needs a moderate boost and a topline emphasis, the cost may be worth it. For a strictly budget-conscious buy, the Farnam or Formula 707 options deliver similar results for less.

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The all-in-one granule that adds probiotics and vitamin E to the weight-building formula for total senior support.

Horse Guard Super Weight Gain is the only product here that combines three jobs into one bag: weight gain from full-fat extruded soybeans, digestive support from probiotics and prebiotics, and immune defense from 1,500 IU of vitamin E per serving. For a senior horse that has been through a stressful move, an illness, or a tough winter, this 3-in-1 approach eliminates the need for separate gut-health and immune supplements. Reviewers point out visible weight gain within four weeks, and one owner notes that after three months their horse’s coat “looked 100x better.”

The bag provides roughly 20 servings at the full feeding rate, which puts it in the monthly-reorder category. The granule form is easy to mix into wet feed, and the brand has been making equine supplements since 1978 — a longevity that counts when you are trusting a product with a fragile senior’s diet. The most common praise points are effectiveness and weight gain, with 49 and 30 owner mentions respectively, while value for money gets a mixed reception; some owners find the price reasonable for the results, others wish it cost less for the bag size.

One practical note from the review data: the supplement is “a lot of product to feed” per serving, and some horses do not finish the full portion if the bag goes stale. Keep the bag sealed in a cool, dry place and use it within a reasonable window.