There is no published minimum. A 2021 systematic review of equine activity time budgets, which is the paper closest to this question, records that free-ranging horses "devote the majority of their time to the search for and consumption of food, spending up to 18 h a day foraging," and separately does not establish a recommended minimum foraging duration for stabled horses. So the number people quote at each other in barn aisles, whatever it is, is not coming from the literature. What the research does support is that the thing being lost when a horse is stabled is time spent foraging and moving, and that is a more useful way to judge an arrangement than counting hours in a field.
What the research actually measured
Auer, Kelemen, Engl and Jenner published "Activity Time Budgets: A Potential Tool to Monitor Equine Welfare?" in Animals 11(3): 850, in March 2021 (Auer et al., 2021, read 2026-08-28).
Three findings from it are worth having.
How much of the day a grazing horse spends eating. Horses in semi-feral conditions were found to dedicate roughly 50.8 to 66.6 percent of a 24-hour day to foraging, and the authors state that "free-ranging horses devote the majority of their time to the search for and consumption of food, spending up to 18 h a day foraging."
What reducing that appears to do. The authors note that "reduction of the time spent foraging may induce health problems such as gastric inflammation and ulceration," and that management interventions providing increased foraging opportunities decreased abnormal behaviours.
What they did not publish. The review does not establish a specific recommended minimum foraging duration for stabled horses, and it does not give a recommended turnout duration at all.
That last point is the important one and it is the reason this page exists. The number is absent from the paper that is closest to the question.
Why "how many hours" is the wrong question
Read the finding again. What free-ranging horses do with their day is eat, in small amounts, more or less continuously, while walking.
Turnout is a proxy for that, and it is an imperfect one.
- Six hours on grass with company is a lot of foraging and a lot of movement.
- Six hours in a bare dry lot with a single hay net is much less of both, and much less company-driven movement.
- Sixteen hours in a stall with hay in front of him all night is not zero foraging, though it is close to zero movement.
So a barn offering ten hours of turnout onto a bare paddock and a barn offering six onto grass are not simply nine and six. The hours are the easy number to compare and they are not the thing that varies most.
That is not an argument that turnout does not matter. It is an argument that the hours figure alone will mislead you, in both directions.
The comparison that is measured, and its limits
Some of the work on stabling routines has compared different confinement patterns rather than different totals. Published work on stabling routines has compared night-stabled horses, confined for around 13.6 hours, with day-stabled horses at around 7.7 hours, and reported that several behaviours including ear movement, locomotory leg movements, yawning, recumbency and non-nutritive chewing occurred significantly more often on a night-stabling routine.
Two cautions before anybody uses that as a rule. First, we did not open that study directly while writing this page, so those figures are reported at second hand from the indexed summary rather than from a paper we read, and they are labelled as such. Second, and more importantly, comparing two confinement patterns tells you which of those two produced more of certain behaviours. It does not produce a minimum turnout figure, and it was not designed to.
What to actually assess
Since nobody publishes a number, here is what the research points at instead. This is a checklist for judging an arrangement, not a standard.
How many hours a day is he eating? Not how much he is fed. How many hours he spends with something to chew. This is the variable the time-budget work is actually about, and it is the one a barn tour never mentions.
How much is he moving? Walking while eating is the natural pattern. A horse standing at a hay pile for six hours is turned out and not moving much.
Does he have company? A great deal of a horse's movement in a field is social. A horse alone in a paddock behaves differently from the same horse in a group.
What happens in bad weather and short days? The winter arrangement is the real arrangement, because that is when turnout gets cut and stall time goes up. Ask about January rather than about June.
What is the ground like? Turnout onto ground that is failing has its own costs, and a horse standing in mud for long periods is exposed to conditions Merck names among those associated with thrush (Merck Veterinary Manual, Thrush in Horses, read 2026-08-28). We work through that trade-off in wet paddock management.
Is he settled? The individual horse is evidence too. A horse who is calm, eating well and holding condition on the current arrangement is telling you something, and so is one who is not.
What this page will not tell you
A minimum number of hours. It is not in the source closest to the question, and inventing one to be helpful would be exactly the failure this site tries to avoid.
That your barn's arrangement is wrong. Six hours is a number that gets criticised online without anybody knowing the field, the group, the forage or the horse.
Anything about what or how much to feed. Rations, forage quantities and feeding plans are veterinary and nutritional territory and this site does not publish them. The finding above is about hours spent eating, not about amounts, and the distinction matters.
Taking it to your barn
If turnout is your concern, the useful conversation is specific rather than general.
Instead of "is six hours enough," ask:
- How long is he out in winter, and what changes when the weather is bad?
- Is there forage in the field, or is it bare at this time of year?
- Is he out with others, and with the same others?
- How long is he standing without anything to eat, overnight?
- What decides whether turnout happens on a given day, and who decides it?
Those are the questions the time-budget research actually points at, and they are answerable. We put the rest of the barn-tour questions together in choosing a boarding barn, and what each board level includes in full board versus pasture board.
FAQ
How many hours of turnout does a horse need per day?
No published figure was found while writing this page. The 2021 systematic review closest to the question does not establish a recommended minimum foraging duration for stabled horses and gives no recommended turnout duration. What it does record is that free-ranging horses spend up to 18 hours a day foraging.
Is six hours of turnout enough?
That depends on what happens in those six hours and what happens in the other eighteen. Six hours on grass with company involves far more foraging and movement than six hours on a bare paddock, and the hours figure alone does not distinguish them.
Is stabling bad for horses?
The review notes that reducing time spent foraging may induce health problems such as gastric inflammation and ulceration, and that management interventions increasing foraging opportunities decreased abnormal behaviours. That is a statement about foraging time rather than a verdict on stables, and a stabled horse with forage available for most of the night is in a different position from one without.
What do horses do all day when they are free-ranging?
Eat, mostly. The 2021 review puts horses in semi-feral conditions at roughly 50.8 to 66.6 percent of a 24-hour day spent foraging, and up to 18 hours a day.
Should I ask my barn for more turnout?
Ask better questions rather than more hours. How long is he out in winter, is there forage in the field, is he out with company, and how long does he go overnight with nothing to eat. Those are the variables the research points at.
Does turnout in mud do more harm than good?
It is a genuine trade-off rather than a rhetorical one. Merck names standing in moist, unhygienic conditions for extended periods among the conditions associated with thrush, and also names lack of exercise as a proposed factor. Both sides of that appear on Merck's own list, which is why the answer is usually to change where the horse stands rather than whether he goes out.
Sources consulted: Auer U, Kelemen Z, Engl V, Jenner F, "Activity Time Budgets: A Potential Tool to Monitor Equine Welfare?", Animals 11(3): 850, 2021, read 2026-08-28, for the 50.8 to 66.6 percent foraging figure, the up to 18 hours a day statement, the note on reduced foraging time and gastric inflammation and ulceration, and the absence of a recommended minimum foraging duration or turnout duration; Merck Veterinary Manual, "Thrush in Horses", read 2026-08-28, for moist unhygienic conditions and lack of exercise among the conditions associated with thrush.
One source is reported at second hand and is labelled in the text: the night-stabled and day-stabled confinement figures come from an indexed summary of published work on stabling routines rather than from a paper we opened, and no conclusion in this article rests on them.
No minimum turnout figure exists in the sources consulted and none is invented here. This site is not written by a veterinarian, and nothing on this page is a ration, a forage quantity or a feeding recommendation.