Water and feed math for horses
Published gallons-per-day figures answer two different questions, and blending them is how a hot-weather haul gets under-watered.
What to stage. UF/IFAS Extension’s VM252 says to plan for at least 10 to 12 gallons of clean water per horse per day. It is written for horses in a disaster, so it is a staging figure, not a prediction of what one animal will drink. Purdue Extension’s maintenance figure, at least 1 gallon per 100 lb of body weight, lands around 10 gallons a day for a 1,000 lb horse. That is the floor for ordinary conditions, and the minimum you should never plan under.
What the animal drinks once weather and workload are in it. NDSU Extension’s AS1763, Livestock Water Requirements (revised February 2026), tabulates estimated daily intake for horses by class, activity level and temperature, adapted from the National Research Council’s Nutrient Requirements of Horses, Sixth Revised Edition, 2007. NDSU’s rows are for its own body weights, so they are not rescaled here.
| Horse |
Activity |
Temperature |
Gallons per day |
| Mature, 1,102 lb |
Idle |
minus 4 degrees F |
11.1 |
| Mature, 1,102 lb |
Idle |
68 degrees F |
8.2 |
| Mature, 1,102 lb |
Idle |
86 degrees F |
12.7 |
| Mature, 1,102 lb |
Moderate |
68 degrees F |
10.8 |
| Mature, 1,102 lb |
Moderate |
95 degrees F |
21.7 |
| Yearling, 661 lb |
Moderate |
68 degrees F |
5.0 |
| Yearling, 661 lb |
Moderate |
14 degrees F |
4.8 |
| Pregnant, 1,102 lb |
not stated |
68 degrees F |
8.1 |
| Lactating, 1,102 lb |
not stated |
68 degrees F |
13.5 |
The idle rows are not monotonic in temperature: the cold row is not the low row.
Using the two together. They answer different questions, so do not average them, interpolate between NDSU’s rows, or rescale them to a different horse. Stage a disaster supply against VM252’s 10 to 12 gallons. When it will be hot and the animals will be working, use the highest NDSU row whose stated scope matches your conditions and name the source beside it. For a mature horse at moderate activity, NDSU’s 95 degree row is about twice its 68 degree row (editorial arithmetic). None of these sources says how often a hauling day is that hot, so that is your judgment about your own property and season. Our horse and livestock evacuation load calculator reproduces NDSU’s full tables, including cattle, sheep and swine, and turns gallons into towed pounds. Confirm your own horse’s needs with your veterinarian, especially in extreme heat.
Days of supply. The sources differ, so know the spread:
- AVMA’s large-animal disaster guidance calls for an evacuation kit with 7 to 10 days of food and a 7 to 10 day supply of water, the water flagged “if possible” given its weight.
- UF/IFAS VM252 says to obtain a 3- to 7-day supply of feed, water and medications.
- CDFA sets a minimum of three days of feed and water before a disaster and, if you must leave animals behind, enough hay for 48 to 72 hours.
- N.C. Cooperative Extension’s Haywood County Center tells producers to have roughly two weeks of feed and medications on hand.
The shorter figures fit getting to a destination or a short shelter-in-place window, and the two-week figure fits the resupply gap after a storm closes feed stores and roads. That pairing is an editorial reading, not something the sources state. Treat any of them as a floor. Scale your chosen day count against the daily water figures above: more horses, more days, more water, staged before you need it.
Shelter in place: one question, three answers
Ready LA County says it does not endorse shelter-in-place as a strategy for large animals, and its fire rules apply to owners who cannot evacuate. If you are still deciding whether this is that moment, our shelter in place or evacuate walkthrough covers the household version of the call.
What changes is what shelter-in-place means once you are stuck with it. UF/IFAS lists both an evacuation plan and a shelter-in-place plan as recommended for hurricanes and tornadoes, and an evacuation plan alone as the recommendation for fire and for flood or mud. The three branches below sort the guidance by hazard.
Branch 1: Fire
This branch draws on Ready LA County’s Horses and Large Animals page, which addresses fire and earthquake. It does not address hurricanes, wind or flooding, so do not carry its rules across to a storm.
- Never turn horses loose, per this source. A loose horse may return home to a burning barn, and loose horses cause serious problems for first responders. This is Ready LA County’s answer, not the only fire answer: other fire-side authorities publish the opposite, and our page on releasing livestock when you cannot load them works through the disagreement.
- Clear the space. Ready LA County passes along its County Fire Department’s recommendation of 200 feet of clearance around your property.
- Use metal pipe corrals, not wood or PVC, which can burn or melt under fire conditions.
- Use leather halters, not nylon. Ready LA County states this without a reason. CDFA lists “Non-nylon leads and halters” in its general Disaster Preparedness Kit with no hazard scoping. UF/IFAS and N.C. Extension instruct the opposite for wind, so treat “leather, not nylon” as the fire answer and follow the halter section above for a storm.
Stage the water regardless of branch. CDFA says not to rely on automatic watering systems, because power may be lost. Ready LA County’s fire page lists a generator among the items to keep near the corral and names a lack of water and power supply among the risks after a disaster. Fill every available tub with clean water beforehand and stage the containers inside the cleared area.
The hardest version is a fire with no warning stage, where there is no time to hitch anything and the question becomes whether to open the gate. Ready LA County answers directly: do not turn horses loose, because they may return home to a burning barn and cause problems for first responders. Turn horses into an arena or metal pipe corral with brush and tree clearance, and put the water and equipment there with them.
That is where the answer stops being one answer. The Lake County Fire Safe Council, the Ventura County Fire Department and the UC Davis Center for Equine Health publish the release side of the same decision. Each names a prepared low-fuel destination rather than an open road, and Lake County and UC Davis both add that the structure the animal came out of has to be closed behind it. Our page on releasing livestock when you cannot load them covers that comparison, the marking methods and what happens to an animal that leaves the property. Settle which answer your property runs on a clear day, not at the gate.
Branch 2: Wind and hurricanes
Here the enclosure is the hazard, which is why the fire rules do not transfer. The guidance below is hurricane guidance. UF/IFAS groups tornadoes with hurricanes when it says both plans are needed.
UF/IFAS’s equine disaster publication says leaving horses outside during disasters is generally recommended, unless the barn or shelter structures were built to withstand hurricane-force winds. Its list of things not to do includes leaving horses enclosed in poorly constructed barns and leaving horses in pastures with overhead power lines.
Take the halter off, or make it a breakaway. This is the instruction most likely to be carried over wrongly from the fire branch. UF/IFAS says to remove all halters or replace them with breakaway halters and not to tie or tether a horse to any structure. N.C. Extension says a halter worn in severe weather must be breakaway.
Mississippi State’s P2507 says the same for cattle without the construction exception: do not pen cattle in small areas or in barns to ride out a hurricane. If evacuation is not possible, the safest thing is to turn them loose in large pastures or pens on high ground, free of debris, large objects and overhead power lines. It tells producers to tie interior gates open where that gives animals access to drinking water and a route to higher ground, and never to leave a gate swinging loose. N.C. Extension’s version for livestock generally is never to leave livestock in a closed barn and to move them to secure pastures or higher locations.
UF/IFAS singles out barbed wire, because submerged wire causes serious injury to animals and to the people moving around the property afterward. It also tells owners to strip free or unnecessary items out of the barn before a storm to cut flying debris.
Where these sources differ. UF/IFAS leaves an opening for a structure engineered for hurricane-force winds; Mississippi State and N.C. Extension state the rule with no such opening. Mississippi State’s publication is written for beef cattle, so its wording about turning cattle loose carries a species caveat when applied to a horse. None of the three says an ordinary closed barn is the right place in a hurricane. All three attach conditions to the pasture: overhead power lines rule it out in UF/IFAS and Mississippi State, barbed wire in UF/IFAS, debris and large objects in Mississippi State, low ground in UF/IFAS and Mississippi State. Walk the fence line on a clear day; do not choose the pasture while the outer bands arrive.
Leaving a fixed leather halter on a horse turned out for a hurricane applies the fire rule to the wrong disaster. This section is split to prevent that.
For the household animals in the same storm, see our hurricane pet preparedness guide, and tornado safe rooms for pets for the short-notice version.
Branch 3: Flood
UF/IFAS puts flood and mud in the evacuate column and says not to leave horses in low-lying areas prone to flooding. Horses trapped in flooded areas or mud may require skilled technical rescue by first responder professionals, which you cannot plan on supplying yourself.
Two flood hazards outlast the water. UF/IFAS says flood water is often highly contaminated with bacteria and can cause significant skin disease in horses standing in it for prolonged periods. It also says wells are susceptible to contamination by bacteria and dead animals after flooding and should be used with caution. Our flood preparedness guide covers the household animals through the same event. Inside a nuclear power plant’s ingestion exposure pathway zone, officials may restrict contaminated food and water rather than order an evacuation; our guide to evacuating pets from a nuclear emergency planning zone covers what that means for grazing livestock.
Prevent the barn fire before it starts
Penn State Extension estimates that careless smoking is the root cause of 95% of preventable horse barn fires, with faulty electrical systems high on the list of the rest. The same source lays out these prevention steps:
- Keep all wiring in conduit (Penn State prefers PVC in humid barns) rather than exposed where a horse or rodent can damage it.
- Use fans and fixtures designed for agricultural use, with dust- and moisture-resistant covers, not household equipment.
- Store hay and bedding in a separate section of the barn or a separate building, and bale hay in the ideal 15-18% moisture range; hay baled too wet can be its own fuel and ignition source.
- Mount a charged ABC-type fire extinguisher where it is easy to reach, every 50 feet in the barn, and use a space heater only as the maker directs and never leave it unattended.
Smaller livestock: chickens, goats and the rest of the property
A full property plan covers everything on it. Arrange transport and a handler for goats, sheep and other livestock the way you do for horses: decide now who drives, who loads and where they go.
For backyard poultry, a rigid crate sized for your flock covers a fast trip, with a cardboard box with air holes as a short-duration backup. Birds are far easier to lift off the roost after dark than to chase around a run in daylight; our backyard chicken evacuation guide covers the catch method, crate sizing and the heat problem a packed poultry crate creates in a car. Pack a few days of feed and water either way. Assign one household member to smaller animals while another focuses on the trailer.
Neighbor networks matter. If you lack trailers for every animal, a phone tree or buddy system with nearby horse and livestock owners, worked out in advance, covers the gap.
This page does not average across species. Loading behavior, heat tolerance, water needs, catch methods and workable ID differ too much between a goat, a mini pig, a llama, a tortoise and a horse for one figure to fit them. The two rules that generalize are to settle transport and the handler now, and not to let the small-animal job and the trailering job compete for the same pair of hands. Anything more specific belongs to the species, and the right source is the one written for that animal.
Local large-animal response groups, and where the trailer is going
Some counties have organized large-animal evacuation groups, such as the North Valley Animal Disaster Group in Butte County, California. These groups are typically activated by county emergency management, not by individual calls, and NVADG’s own contact information reflects that. Identify your local group in advance and learn how it is activated.
In an active emergency, the escalation is 911 or your local sheriff’s non-emergency line, not a search for a livestock response group. USDA APHIS also coordinates on disaster- and disease-related livestock issues through its Area Veterinarians in Charge in each state, a resource to know about ahead of time.
Decide where the trailer is going before you need to go. A hitched trailer with no confirmed destination is half a plan. Name a specific place with fencing that will hold your animals, such as a fairgrounds, a boarding barn or a friend’s property, and a second one in a different direction, because the hazard can sit on the route to your first choice. Find out what the destination asks for on intake while you have time to get it.
After: the phase most large-animal advice skips
UF/IFAS Extension’s equine publication carries a recovery list for the return to the property:
- Find and examine every animal as soon as possible. A headcount from the truck window is not an examination. UF/IFAS cautions that horses may behave fractiously from stress or injury, that owners are advised to be trained in basic equine first aid, and that first responders and veterinarians often carry high call volumes after a disaster, so on-farm medical help can be delayed or impossible.
- Check fences and property for damage, debris or safety issues before turning anything back out.
- Call the power company if power lines or towers are damaged. That is a phone call, not a repair you make yourself.
- Take photos and record damages to property, vehicles, barns and animals. The list ends with filing insurance claims and contacting your local agricultural response team, emergency operations center or extension agent.
- Dump contaminated standing water and follow up with mosquito control.
From the water and feed section of the same publication: wells are susceptible to contamination by bacteria and dead animals after flooding and should be used with caution.
Feed needs its own walk-through. Mississippi State’s P2507 notes that livestock may refuse forage from areas contaminated by salt water because of palatability, and that baleage left exposed to the elements spoils rapidly and is likely a loss unless rewrapped or sealed away right away. It says not to feed moldy or otherwise unsafe feeds. Walk the hay and baleage before you feed off it, and treat what got wet as a question.
Two questions belong to this phase and are veterinary calls, not property checks: whether a horse that has just been hauled is drinking and passing manure normally, and when a horse that breathed wildfire smoke can go back to work. Ask your veterinarian. Our wildfire smoke guide covers the exposure phase for household animals. This page gives no number for either question.
Build the plan before the warning
Everything above works only if it is in place before a warning: a trailer that is road-ready and fueled, a horse that has practiced loading, a halter staged at every stall and the right halter for your hazard, permanent ID confirmed, paperwork legible and in a watertight bag, a destination that has agreed to take you, and a neighbor network you have actually talked to. None of it can be assembled in the fifteen minutes after you smell smoke.
Also know which branch your property is likeliest to run. Fire country and hurricane coast ask opposite things of the same pasture, barn and halter. If you have both risks, write down both answers before either arrives.
For the household side of a mixed-species property, our multi-pet emergency planning hub covers grab-order and supply math across species, and which pet to evacuate first walks through the harder call when you cannot move everyone in one trip. For the smaller animals, our DIY pet go-bag checklist and waterproof document kits guides cover the supplies and paperwork that travel with any animal. The pet emergency playbooks hub is the index.