Quick answer: Net-wrapped dry hay is safe for horses as long as you remove the net wrap before feeding — exactly like you would remove twine. The mesh is just packaging; it holds a dry bale together and is not eaten by the hay. The thing horse owners actually need to worry about is baleage / haylage — high-moisture forage sealed in airtight plastic film to ferment. That is a completely different product, and if it is made or stored poorly it carries a real (though preventable) botulism risk. Net wrap ≠ silage wrap. Know which one you are buying.
If you keep horses and someone offers you "wrapped" round bales, you have probably felt that flash of doubt: is net-wrapped hay safe for horses, or is this the stuff that can make them sick? It is one of the most common — and most confused — questions in the hay world. We see it constantly on producer forums, where a worried owner opens a "wrapped" bale, catches a fruity or sour smell, and starts reading scary articles about botulism.
The confusion is understandable, because two very different bales both get called "wrapped." This guide clears it up. We will explain the difference between net wrap and baleage, answer whether net-wrapped hay is safe for horses, lay out the genuine risks of feeding fermented wrapped forage, and give you a buyer's checklist. We pulled the real-world concerns straight from horse owners and hay producers on HayTalk's alfalfa-hay forum and checked them against veterinary and university-extension guidance.
Net wrap vs. baleage: two very different "wrapped" bales
This single distinction resolves about 90% of the worry. The word "wrapped" gets used for both, but they are not the same product, the same moisture, or the same risk profile.
| Feature | Net wrap (mesh) | Baleage / silage wrap (film) |
|---|---|---|
| Material | Open polyethylene mesh (you can see through it) | Solid, stretchy plastic film, 6+ airtight layers |
| Forage moisture | Dry hay, usually under 15–18% | High moisture, ~40–60% (often 30–45% for horse baleage) |
| What it does | Holds bale shape, sheds rain — not airtight | Seals out air so the forage ferments and preserves |
| Botulism risk | None from the wrap — it is dry hay | Possible if fermentation fails or a carcass is baled in |
| Before feeding | Remove all mesh | Remove all film; inspect and smell first |
So when an article warns that "wrapped hay" can kill horses, it is almost always talking about baleage — fermented forage in airtight film — not the net mesh on a dry round bale. A bale of dry hay held together with net wrap is, for feeding-safety purposes, the same as a twine-tied dry bale.
Is net-wrapped dry hay safe for horses?
Yes. Net-wrapped dry hay is safe to feed horses, with one rule that applies to every round bale regardless of wrap type: take the wrap off before the horses get to it. Net wrap is high-density polyethylene mesh — it is packaging, not feed, and a properly dry bale carries no fermentation or botulism risk because there is no anaerobic, high-moisture environment for bacteria to grow in.
Michigan State University Extension makes the same practical point in its guidance on feeding round bales to horses: dry round-bale hay is a normal horse feed, and the management priorities are removing the wrap, keeping the bale dry, and limiting waste and mold once the bale is opened to the herd. The wrap itself is simply something you peel off and throw away.
Pro tip: Net wrap actually helps the hay you feed horses. Because the mesh covers the whole bale surface, net-wrapped bales stored outside typically lose only 5–10% dry matter, versus 15–35% for twine-tied bales where water runs in between the strings. Less spoiled outer layer means less moldy, dusty hay reaching sensitive equine lungs. See our breakdown in net wrap vs. twine.
Can horses eat net wrap? The impaction risk
Horses should never eat net wrap. If wrap is left on a bale, or scraps are left on the ground, a horse can ingest plastic mesh while pulling hay. Indigestible plastic does not break down in the gut and can accumulate, contributing to colic or impaction over time. This is the same mechanism documented at length in cattle.
The fix is simple and non-negotiable: remove every bit of wrap, and pick scraps up off the ground. Do not unroll or grind a bale with the net still on it, and do not let horses clean up around a bale ring where shed mesh collects. For the full picture on how plastic accumulates in a ruminant or equine gut — and the warning signs — see our detailed article on net wrap and livestock impaction and our guide to removing net wrap safely.
Is baleage / haylage safe for horses?
This is the real heart of the question. Baleage (also called haylage) can be an excellent horse feed — it is low-dust, palatable, and widely fed to performance and broodmare strings in Europe and parts of North America. Producers on HayTalk describe loyal equine customers for grass baleage made around 30% moisture, and one racing operation reported "zero coughing in the barn" after switching. But baleage only stays safe when it is made and handled correctly, and horses are far less forgiving than cattle.
The botulism concern
Clostridium botulinum is an anaerobic bacterium whose toxin is among the most potent known, and horses are exquisitely sensitive to it. According to the Merck Veterinary Manual, botulism in horses is frequently linked to spoiled or improperly fermented forage and to animal carcasses (a mouse, bird, or small mammal) baled into the forage. As one veteran wrapper put it on the forum: bales made too dry to ferment "are not wet enough to properly ferment and get acidic enough to kill botulism. Cattle can deal with it but horses can get a bit dead."
Two conditions make baleage risky for horses:
- Incomplete fermentation. Good baleage ferments down to a pH below about 5, which suppresses C. botulinum. Forage baled too dry (or wrapped too late) may never reach that acidity — it just sits as damp, un-acidified hay where the organism can survive.
- A broken seal. Any tear, puncture, or bird hole lets air in, fermentation stalls, and mold or bacteria move in. Forum users repeatedly trace problems to "bird punctures or the hay puncturing itself."
The danger is not hypothetical. One forum member recounted a regional incident in which 23 horses died of botulism at a single farm, and another lost two draft horses after feeding wrapped hay. These are the stories that (rightly) make horse owners cautious — and they are why a botulism toxoid vaccine is the standard recommendation for any horse routinely fed fermented forage. Immunity takes roughly 3–4 weeks to develop after the initial series, so vaccinate well ahead of feeding.
Mold, dust, and over-conditioning
Beyond botulism, poorly made wrapped forage can carry mold that triggers equine asthma (heaves), and high-energy baleage can put weight on easy-keeping or metabolic horses fast. Never feed wrapped forage that is slimy, foul, or visibly moldy — when in doubt, throw it out.
If you choose to feed wrapped forage to horses
- Source it from a producer who makes baleage specifically for the horse market and bales clean fields free of carcasses and excess soil/ash.
- Ask for a forage test, including pH (target below ~5) and moisture.
- Vaccinate against botulism (allow 3–4 weeks for immunity).
- Feed each opened bale within 2–3 days; once the seal is broken the clock starts.
- Reject any bale with tears, mold, off smells, or a "fruit-salad-in-a-hot-car" odor.
If all of that sounds like more risk than you want to manage, you are not alone — and that is exactly why clean, net-wrapped dry hay remains the simplest safe choice for most horse owners. For the production side of fermented forage, see our first-time baleage guide and baling-moisture guide.
Buying wrapped hay for horses: a 7-point checklist
Use this before you load a single "wrapped" bale for horses:
- Identify the wrap. Open mesh = net wrap on dry hay (low risk). Solid airtight film = baleage (manage carefully).
- Check moisture. Dry horse hay should be under ~15%. Use a hay moisture tester if you are unsure.
- Smell it. Dry hay should smell clean and grassy. Sour, fruity, or ammonia smells on "dry" hay mean trouble.
- Look for mold and dust. White, gray, or black patches and heavy dust are disqualifiers for horses.
- Inspect the seal (baleage only). Reject torn, slumped, or bird-pecked film.
- Ask about the field and carcass risk. Reputable horse-hay producers bale clean and pull carcasses.
- Confirm you can remove all wrap before feeding and pick up scraps.
Selling hay to horse owners: why clean net wrap wins
If you sell into the horse market, the lesson from the forums is consistent: horse buyers pay premiums for clean, low-dust, well-preserved hay — and they spook easily at anything that looks like "silage." For most operations, the highest-value play is excellent net-wrapped dry hay, not baleage:
- Net wrap's full-surface coverage cuts spoilage and keeps the bright color and clean smell horse buyers want.
- It avoids the botulism conversation entirely, which protects your reputation — and one bad bale, as producers note, "spreads to other buyers quickly."
- It is faster and cheaper per bale than tubing or individually wrapping baleage.
The quality of the wrap matters here: consistent, full-width net wrap that covers edge to edge is what produces the tight, weatherproof, good-looking bale a horse customer reorders. That is what we build XES® Extreme net wrap to do.
Frequently asked questions
Is net-wrapped hay safe for horses?
Yes. Net-wrapped dry hay is safe for horses as long as you remove all the mesh before feeding. Net wrap is just polyethylene packaging on a dry bale; it carries no fermentation or botulism risk. The wrap should never be eaten, so peel it off and pick up any scraps.
What is the difference between net wrap and baleage?
Net wrap is open plastic mesh that holds a dry hay bale together and sheds rain. Baleage is forage baled wet (about 40–60% moisture) and sealed in airtight plastic film so it ferments. Net wrap is not airtight and does not preserve forage; baleage does.
Can horses get botulism from net-wrapped hay?
Not from net-wrapped dry hay. Botulism risk is tied to high-moisture fermented forage (baleage/haylage) that fails to acidify or that contains a baled-in carcass. Properly dried, net-wrapped hay has no anaerobic environment for Clostridium botulinum to grow.
Should I vaccinate horses fed baleage or haylage?
Yes. Veterinarians recommend a botulism toxoid vaccine for horses routinely fed wrapped fermented forage. Immunity takes about 3–4 weeks after the initial series, so vaccinate before you start feeding. It is inexpensive insurance against a frequently fatal disease.
Do I really have to remove net wrap before feeding horses?
Always. Indigestible plastic mesh can accumulate in the gut and contribute to colic or impaction. Remove every bit of net wrap or twine, never grind or unroll a bale with wrap on it, and pick scraps up off the ground around feeders.
The bottom line
So, is net-wrapped hay safe for horses? Yes — net-wrapped dry hay is a normal, safe horse feed once you remove the mesh. The product that demands real caution is baleage: fermented forage in airtight film, which can be excellent for horses but carries a genuine botulism risk if it is made or stored poorly. Tell the two apart, remove all wrap before feeding, and when you want the simplest safe option, choose clean, well-made net-wrapped dry hay.
Producing that hay starts with wrap that covers the whole bale and keeps weather out. Explore XES® Extreme bale net wrap, or keep reading our round-bale storage guide to protect every bale you make for the horse market.
Sources: Merck Veterinary Manual, "Botulism in Animals" (merckvetmanual.com, accessed June 11, 2026); Michigan State University Extension, "Feeding round bales to horses" and "Baleage for horses" (canr.msu.edu, accessed June 11, 2026); Penn State Extension, Equine program (extension.psu.edu, accessed June 11, 2026); HayTalk.com alfalfa-hay forum, threads "Wrapped hay, is it safe for horses?" (#98008), "Haylage for Horses" (#18821), accessed June 11, 2026. This article is general guidance, not veterinary advice — consult your veterinarian for your horses.
Featured photo: Horse and hay bale by Cjp24, licensed under CC BY-SA 3.0, via Wikimedia Commons.
