How much grass do horses need?
As some of you may know, I have just come back from Mongolia, the original land of the horse. I was fortunate to be part of a scientific expedition to a mountainous region in the West of Outer Mongolia.
You can read the official trip report here
https://www.nelipotcottage.com/the-mongolian-baatar-expedition-2018/
Horses were our main form of transport, and our expedition team included a zoologist, a botanist, and an archeologist as well as the herdsman and grooms who looked after us and our trusty steeds. Amongst other lessons, this was a unique opportunity to learn about the incredibly bio-diverse plants of Mongolia, in the context of fodder for the sturdy little mountain horses.
How much grass do horses need?
When you look out across the steppes, mountains and plains of Western Mongolia, it all looks really green.
However, when you get closer to the green, it’s actually sandy, rocky, shaley soil, with a patchy smattering of plants; mostly succulents. This part of the country is really arid, with very little ground moisture, so succulents and hardy herbs and weeds do best. The plants were often tiny, yet with really complex, swollen, almost tuber-like root systems.
Trees were a rarity, growing only by oases or rivers. Winter had been late this year, so the flowers weren’t really out when we arrived, but did start to appear later in the trip when there had been some rain. We flew into and out of Khovd, the small domestic airport that serves Western Mongolia, and we could see a definite difference in the green cover between arriving and leaving, 2 weeks apart.
There are over 3,000 plant species described in Mongolia, with over 975 having a use in traditional medicine. On the lower slopes of the Altai mountains, our botanist told we should expect to find 14-18 different species of plant within a metre square. None of these would be species that you and I would recognise as grass. There were lots of varieties from the pea family, a Mongolian thistle, Mongolian chives (delicious as a snack when travelling), bellflowers, Iris, Ephedra, and Artemesia or wormseed. My olfactory memory of our trip will be a perfume made up of Artemesia, DEET, leather and horse sweat- a heady combination indeed!
The horses were tough little buggers; approximately 13-14hh. They were all barefoot, obviously. None of the horses are trained to pick their feet up and none of the herdsman owned a rasp, so they are all self trimming. Feet varied in shape; although the majority were very similar to the mustang hoof we see in the Pete Ramey and Jaime Jackson books, there were some with flares, and slightly longer toes. The feet were all incredibly tough, and highly functional.
We travelled across boulder fields, up and down stony mountain tracks, across steep scree slopes, as well as across the green(ish) foothills and the more gravelly steppes, and the little horses picked their way confidently over all terrain, for 20-30 kms a day, and were still keen to charge into camp at the end of the day.
We gave them a day off after a few tough days, and then an easy day on the last day which the herdsman must have cursed us for, as it took them two hours to round them all up for their night-time trip back over the hills for their next clients. Even in hobbles, some of them could move pretty fast!
They were lean, but very fit. During the day, they got a snack at lunchtime, grazing around in hobbles while we ate our little picnic boxes of pasta or cracked wheat with chewy beef, and they were sure to drink copiously from every stream we crossed.
At night, the bits were slipped from their mouths, although the rawhide bridles were left on, and they were hobbled and turned loose around the campsite. In the morning the herdsman would jump on the nearest horse and go and round up the others, ready for action.
How much grass do horses need?
Not much, apparently, in the high mountain country. The herdsman and the botanist knew which plants contained the minerals and vitamins the animals needed for good health, and the horses self selected at every opportunity. At stream crossings, while waiting their turn, they took the chance to grab mouthfuls of more lush reeds and grasses. If we stopped to take photographs of a new variety of herb or plant, the horses also checked out what we had found and had a quick munch.
In Hustain, back in the East and South of Ulan Bataar, there is a reserve where the Przewalski horses thrive in the wild. Here, at lower altitudes, the plains were greener and lusher, but we still counted 18-25 species within a square metre, and over 90 varieties of plant just in the small valley where our campsite was situated. There were more grasses here, as well as numerous wildflowers and herbs. 
The Takhi, or Przewalski, were very plump, but they get a very short summer and a long harsh winter, so presumably were layering up fat for the cold, None of them seemed to have pathological or sore feet.
Back home.. I looked at a few scattered metre squares in our field. I got up to 9 species of plant in the best one, and have about 20 species of plants altogether if I count the hedgerows and the low hanging tree branches. We have this little lovely- Prunella Vulgaris or Selfheal. What a useful weed! 😍
Below is a bouquet of grass flowers from our re-wilding area,
https://www.nelipotcottage.com/grow-your-own/
over-seeded with gifts from a friend, who inadvertently bought one of the last remaining areas of Upland Hay Meadow in the UK with his retirement cottage.
So how much grass do horses need? The answer seems to be, not much grass at all actually. As long as they have access to a wide variety of plants including grasses, herbs, weeds and trees they should be able to meet all their nutritional needs. The key to whole horse health is surely preserving the biodiversity of the fields they graze in, and also their own hindgut micro-biome?
The Mongolian horses were very skilled at self selection.
In human nutrition, we know that almost everything in moderation is good, while anything to excess can be bad, even celery!
Why would horses be any different?
We “know” that bracken is poisonous to horses. But bracken contains an insulin like compound. Eaten to excess (12kg, the research says) then yes, too much insulin like compound would be toxic. But in Spring, when the lush grass comes through, a little bit of bracken can help the horse cope with the sugar- rich grass flush and protect them against laminitis.
Likewise, oak trees are supposedly poisonous to horses. But oaks contain tannins, which have an anti – helminthic effect. Our horses choose to browse the low hanging oak branches in the field, and love to drink out of the tea- coloured stream that runs through the peat bog in the forest. Are they doing their own worm control regime?
Or even better, their own pro-biotic? I’m now buying EM1- Effective Micro-organisms, a suspended culture of live bacteria for hind gut health. Drinking from a muddy puddle may well provide the same bacteria, in a handy suspension, at no cost?
Maybe, when horses gorge on acorns, escape from fields or break into feed rooms, it’s because they don’t have sufficient to meet their needs? Was their paddock bare, had the haynet run out, or are they craving a vital nutrient that cannot be obtained from grass alone?
Our horses only break into the middle grass, off the track, if the Haylage feeders run dry and there isn’t enough on the track to interest them. Last Friday, the Haylage finished overnight but the hedgerow is chock full of fun stuff like blackberries and fresh hawthorn, and the track is now covered in tiny bits of green- they didn’t beak through the electric despite the battery being low.
So much grass do horses need?
I guess it all depends on the quality of your meadow-
Maybe a better question would be how many grasses do horses need?
Here’s a challenge– how about you go and measure a rough metre square in your grazing and count how many different species of plant grow there?
here are some links to other accounts of the trip
https://www.caymancompass.com/2018/08/12/cayman-resident-explores-the-steppes-of-mongolia/
