11 min read Last updated: January 2026 Struggling to keep weight on an ulcerprone horse without lighting the starch fuse? Heres a simple, ulcersafe plan showing exactly how much micronised linseed to feed300400 g/day of a 3540% oil, ~4% starch seedalongside BETAapproved fibre, so you gain steady condition, topline and shine within weeks. Quick Summary Short on time? Here are the key takeaways. Area: Micronised Linseed What To Do: Choose micronised linseed over plain oil to add calories, omega3 and quality protein. Feed it daily alongside foragebased meals. Why It Matters: It builds condition and topline with low starch and added fibre for gut comfort. Common Mistake: Relying on linseed oil alone and missing the fibre/protein that support digestion. Area: Set Feeding Rate What To Do: Start at 50120 g/day and increase every 34 days towards 0.60.8 g/kg BW/day (300400 g/day for 500 kg), split across meals. Cap total linseed products at about 454 g/day. Why It Matters: Gradual increases improve tolerance and deliver safe calorie gains. Common Mistake: Jumping straight to high amounts, causing loose droppings or refusals. Area: FibreFirst Ration What To Do: Base the diet on adlib forage and a BETAapproved, lowstarch, highfibre feed (<8% starch, <6.5% sugar). Add beet pulp or soya hulls for extra superfibre calories. Why It Matters: Fibre buffers stomach acid and reduces ulcer flareups while supplying steady energy. Common Mistake: Using cerealheavy mixes or whole grains that spike starch intake. Area: Add Gut Support What To Do: Include a gut balancer with pectin/lecithin, especially around training or after omeprazole. Offer a small fibre feed 2030 minutes preride for buffering. Why It Matters: Extra protection supports the squamous lining and rideable comfort. Common Mistake: Skipping preride fibre or micronutrients, then blaming linseed for discomfort. Area: Weigh and Split What To Do: Weigh your product once (e.g., 150 ml 80 g) and feed 23 times/day. Adjust scoop counts to hit targets accurately. Why It Matters: Accurate dosing prevents under or overconditioning and gut upsets. Common Mistake: Guessing scoop weights or dumping the full amount in one feed. Area: Monitor & Adjust What To Do: Check droppings, coat, rib cover and girth weekly; change linseed by 50100 g steps as needed. Swap to linseed meal if oiliness softens droppings. Why It Matters: Small, timely tweaks keep gains steady without gut compromise. Common Mistake: Leaving the ration unchanged despite loose stools or rapid weight gain. Area: Seasonal Management What To Do: In autumn/winter, keep forage consistent and use rugs to stay warm and dry so calories build condition. Maintain cool work energy with linseed instead of cereals. Why It Matters: Reduced heat loss means more feed goes to weight and topline. Common Mistake: Underrugging or irregular forage, then overfeeding starch to catch up. Area: Choose Omega3 Oil What To Do: If using oil, pick linseed/flax oil and/or replace some oil with micronised linseed. Avoid corn oil high in omega6. Why It Matters: An omega3 bias supports antiinflammatory balance and coat shine. Common Mistake: Adding corn oil and increasing dietary omega6 load. In This Guide Why linseed works for ulcer-prone horses Micronised linseed vs oil: which builds weight better? How much linseed to feed and how to start What to feed with linseed for ulcersafe gains UK seasons: when linseed earns its keep Monitoring results and what to avoid Practical feeding plans you can copy Quality and compliance: British standards to trust Struggling to keep condition on an ulcer-prone horse without lighting the starch fuse? Linseed especially in micronised form is one of the safest, most effective ways to add calories, omega-3 and quality protein without upsetting a sensitive gut.Key takeaway: For ulcer-prone horses, feed micronised linseed (3540% oil, low starch) alongside a BETA-approved, high-fibre, low-starch ration to promote steady weight gain, topline and a glossy coat.Why linseed works for ulcer-prone horsesLinseed provides high calories from oil with very low starch, plus soluble fibre and omega3s that support a healthy, calmer digestive system. This makes it a top choice for building condition without aggravating Equine Gastric Ulcer Syndrome (EGUS).Ulcer management hinges on fibre-first feeding. As Horse & Hound advises: A horse with diagnosed or suspected gastric ulcers should receive a high-fibre, high-forage diet that contains little or no whole cereal grains.Linseed (flax) delivers just that: energy from fat, not cereals, and a naturally antiinflammatory omega3 profile. Whole or micronised linseed typically contains 3540% oil, around 4% starch and approximately 22% protein per the meal component, whereas extracted linseed oil is pure oil with no protein or fibre. That balance helps ulcer-prone horses maintain weight, coat and topline while keeping stomach acid buffered by forage and soluble fibre.For owners replacing cereals with safer calories, researchers conclude linseed byproducts can be safely used with other fibre sources:Linseed by-products (linseed groats 0.8 g/kg BW/d) combined with other fibre sources can be safely used... in feeding strategies replacing grains in the horses rations in order to reduce the intake of starch. PMC studyMicronised linseed vs oil: which builds weight better?Micronised linseed generally builds weight better than oil alone because it delivers 3540% oil plus fibre and roughly 22% protein, whereas plain linseed oil is 100% fat with no protein or fibre.Micronisation gently cooks the seed to improve digestibility, preserving the valuable oil while providing soluble fibre and amino acids essential for muscle and topline. By contrast, linseed oil offers calories but none of the fibre or protein that supports healthy digestion and steady condition. If youre feeding an ulcerprone horse, those added fibre fractions matter for buffering and gut comfort.Key numbers you can use:Micronised linseed/linseed meal: ~3540% oil, ~4% starch, ~22% protein. A 150 ml scoop weighs ~80 g.Linseed oil: 100% oil (no protein, no starch).Linseed meal (after oil extraction): averages ~12% fat and ~36% protein; useful as a protein topup but lower in omega3 than whole/micronised linseed.For omega balance, linseed leads the field. As Equinutritive notes:For an almost perfect balance of Omega3 and Omega6 fatty acids, linseed/flax oil has proven itself to be the oil of choice... Beyond being ingested as an oil, it can be provided in the form of micronised linseed.Compared with corn oil (high in proinflammatory omega6), linseeds omega3 bias is a better match for daytoday conditioning, coat shine and overall digestive comfort.How much linseed to feed and how to startSafe feeding rates are 0.8 g/kg bodyweight/day for linseed groats (about 400 g for a 500 kg horse) and up to 454 g/day of linseed products in total; start at 50120 g/day and increase gradually over 1014 days.Follow this simple, evidenceled plan:Start low: 50120 g/day of micronised linseed (or 3060 ml/day of oil) mixed into a dampened, foragebased meal.Build slowly: Increase every 34 days, aiming for 0.60.8 g/kg BW/day (e.g., 300400 g/day for a 500 kg horse), split across two or three feeds.Upper practical limit: 454 g/day total linseed products is a sensible ceiling for most horses in work.Monitor tolerance: If droppings soften, hold or reduce the dose; switch to loweroil linseed meal if needed.Weigh accurately: A 150 ml scoop of linseed meal is approx. 80 g. Weigh your specific product once to confirm.In a controlled trial, feeding linseed groats at 0.8 g/kg BW/day (about 6.36.7% of diet dry matter) improved crude protein and fat digestibility in hayoats diets without adverse effects on blood parameters or health (PMC).Quick tip: Pair linseed with a comprehensive balancer or vitaminmineral supplement to keep micronutrients aligned as calories increase. Explore our curated range of horse supplements and gut balancers to support the transition.What to feed with linseed for ulcersafe gainsCombine linseed with a highforage, highfibre ration thats low in starch (<8%) and sugar (<6.5%), ideally with BETA approval for horses prone to gastric ulcers.Forage (hay, haylage, turnout) should be the backbone, offered adlib where possible to keep the stomach tricklefed. Your bucket feeds should be fibrebased, low in cereal content and fortified with quality protein sources for topline. Look for the BETA Suitable for Horses and Ponies Prone to Gastric Ulcers mark to simplify your shortlist; as Baileys explains, this approval helps owners identify the right feeds for EGUSprone horses.Examples of good companions to linseed include:BETAapproved conditioning fibres (e.g., Dengie Performance Fibre at 11.5 MJ/kg) to supply slowrelease energy and support weight gain.Super fibres like beet pulp and soya hulls for extra calories from digestible fibre, not cereals.Gutcomforting addons like pectin and lecithin, especially postomeprazole, to help protect the squamous lining.At Just Horse Riders, we recommend selecting a fibre base with starch around 68% and a superior amino acid profile (lysine-first) to build muscle over the topline. Pair that with 300400 g/day of micronised linseed for most 500 kg horses in regular work and adjust every 1014 days based on weight and droppings.Pro tip: If you already use oil, consider switching part or all of that volume to micronised linseed for the added fibre and protein. Youll often see steadier condition, better droppings and more rideable energy.UK seasons: when linseed earns its keepThrough UK autumn and winter, linseed supplies safe extra calories during the hunger gap when grass quality dips, without adding cereal starch that can unsettle a sensitive stomach.Wet British winters and frequent stabling challenge condition: forage can vary week to week, turnout is reduced and some horses lose cover fast. Linseed is easy to mix into fibre feeds, with a palatable taste most horses accept straight away. Because its oilbased energy, it also supports those who need cool calories for hacking, lessons or hunting in cold, blustery weather without adding fizziness.Make comfort a priority when the weather turns: suitable rugs help your calories go further by reducing energy lost to thermoregulation. Explore our range of winter turnout rugs for mudproof protection and our cosy stable rugs for chilled nights on the yard.For performance horses keeping their edge in variable weather, Horse & Hound highlights the value of oilbased energy in ulcersafe feeds a useful nudge for those wet and windy schooling blocks.Monitoring results and what to avoidExpect a shinier coat and more cover over the ribs and topline within a few weeks; reduce the dose or switch to loweroil linseed meal if droppings soften or weight gains too quickly.What to watch:Positive signs: glossier coat, better skin, easier weight maintenance, improved rideability (less starchspike behaviour).Neutral checks: energy level remains cool and consistent; saddle still fits as topline changes.Red flags: loose droppings, greasy coat, or too much condition dial back linseed or split into more feeds; consider moving from whole/micronised to higherprotein, loweroil linseed meal if needed.Coat condition often improves quickly with omega3 support. Keep on top of external care too: regular grooming lifts natural oils to the surface and can magnify that linseed shine. Our grooming collection has everything you need to finish the picture from curry combs to coat sprays.If your horse has a clinical history of EGUS, work with your vet or nutritionist on quantities and timing, particularly around training and competition days. Linseed pairs well with preride fibre feeds to help buffer stomach contents.Practical feeding plans you can copyFor a 500 kg ulcerprone horse, a proven starting plan is adlib forage, a BETAapproved lowstarch fibre feed, 300400 g/day micronised linseed split between meals, and a gut balancer containing pectin/lecithin.Use these sample templates and adapt every fortnight by condition score and droppings:Poordoer in light/medium workForage: adlib hay/haylage; small haynet preexercise for buffering.Bucket feed (23 times/day): BETAapproved, lowstarch conditioning fibre; add 100150 g micronised linseed per meal (total 300450 g/day).Supplements: vitaminmineral balancer; gut balancer with pectin/lecithin; salt/electrolytes as workload dictates. See our supplements selection.Review: aim for 0.250.5 body condition score gain per month; if dropping, add 50100 g/day linseed or increase fibre feed volume.Gooddoer with a history of ulcersForage: controlled but frequent access (e.g., smallhole net) to maintain trickle feeding without excess calories.Bucket feed: highfibre, lowstarch chaff plus 100200 g/day micronised linseed; consider linseed meal (lower oil, higher protein) if weight climbs too fast.Monitoring: keep starch under ~8% of total ration; drop linseed by 50 g increments if condition creeps up.Performance horse needing cool energyForage: adlib quality hay/haylage; add beet pulp/soya hulls for superfibre calories.Bucket feed: BETAapproved performance fibre (e.g., 11.5 MJ/kg category) + 300454 g/day micronised linseed; split across 3 meals.Optional: highoil conditioning pellets (e.g., rice bran/linseed blends ~3040/5 kg) if extra topend calories needed; keep starch low overall.If you prefer to feed pure oil, choose linseed/flax oil (1020 per 1 L typical) over corn oil to maintain an omega3 bias. But for most ulcerprone horses, micronised linseed wins on digestibility and overall gut comfort.Budgetminded? Keep an eye on our rotating deals in The Secret Tack Room (clearance) ideal for stocking up when you dial in a ration that works.Quality and compliance: British standards to trustBETAs ulcersuitable approval scheme helps UK owners identify feeds proven appropriate for horses prone to gastric ulcers. Always prioritise the BETA mark when choosing conditioning fibres to sit alongside linseed.In line with UK guidance, any product indicated as suitable for horses and ponies prone to gastric ulcers should demonstrate highfibre, lowstarch credentials and follow BETAs protocols. Brands like Dengie and Baileys participate in this assurance framework, making selection simpler in busy yard life and through unpredictable UK winters.At Just Horse Riders, we stock trusted brands and supportive extras that fit this philosophy, from omegarich conditioners to targeted gut balancers and triedandtested yard staples. For brandspecific solutions, explore our NAF range for digestive and coat support aligned with your linseed plan.Troubleshooting and finetuningIf your horse isnt gaining despite linseed and fibre, increase total forage quality and quantity first, then add 50100 g/day linseed increments every 710 days. If droppings soften, pause increases or step back 50100 g.Common pitfalls and easy fixes:Feeding oil only: swap all or part of oil for micronised linseed to add fibre/protein for better utilisation.Too much starch elsewhere: recheck labels; aim under ~8% starch and ~6.5% sugar in bucket feeds for ulcerprone horses.Irregular feeding times: prioritise little-and-often, especially preride fibre to buffer acid splash.No micronutrients: add a balancer to avoid hidden plateaus from vitamin/mineral gaps.Cold, wet horse: spare those calories by keeping them warm and dry with appropriate rugs and good management.As Baileys reminds owners, the BETA mark on fibre feeds is your shortcut to suitability for ulcerprone horses (read more). Pair that assurance with linseeds omega3 profile for a practical, researchbacked route to condition.FAQsIs micronised linseed better than linseed oil for weight gain?Yes. Micronised linseed supplies 3540% oil plus fibre and around 22% protein, which supports digestion and topline; oil is 100% fat with no fibre or protein. Most ulcerprone horses do better on micronised linseed.Can linseed help an ulcerprone horse gain weight safely?Yes. Linseed is low in starch and rich in omega3 and soluble fibre, making it ideal alongside a highforage, BETAapproved lowstarch ration. See the Horse & Hound guidance.How much linseed should I feed my horse?Use 0.8 g/kg bodyweight/day for linseed groats (400 g/day for 500 kg) or up to 454 g/day of linseed products total. Start at 50120 g/day and build slowly over 1014 days. Evidence shows improved fat and protein digestibility at these levels (PMC).Does linseed oil cause inflammatory imbalances like corn oil?No. Linseed has an omega3dominant profile and is highly digestible, whereas corn oil is high in omega6. For antiinflammatory balance, linseed is the oil of choice (Equinutritive).How quickly will I see results from linseed?Many horses show a shinier coat and steadier condition within a few weeks when linseed is fed consistently with a fibrefirst diet. Monitor droppings and weigh or measure girth weekly to track changes.What should I feed with linseed to keep starch low?Choose BETAapproved, highfibre feeds with starch under ~8% and sugar under ~6.5%, and base the diet on adlib forage. See the BETA guidance via Baileys ulcer library.Any UK winter management tips while feeding linseed?Yes: keep them warm and dry so calories build condition, not body heat. Wellfitting turnout rugs for the field and stable rugs at night help your linseed calories go further through the hunger gap. Shop the Essentials Everything mentioned in this guide, ready to browse. Shop SupplementsShop NAF SupplementsShop Turnout RugsShop Stable RugsShop Grooming Kit