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Because most of them are being ridden and exercised everyday, and that builds up muscle. Horses are very muscular animals. They also run around in their pastures too.

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Q: Why do horses have so much muscle when all they eat is grass and hay?
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Related questions

What can all horses eat?

all horses can eat hay/grass. all horses can eat hay/grass.


How much muscle does a Quarter horse have?

It depends on how much you exercise your horse. All quarter horses were bred for endurance, so they are naturally good at endurance, but the muscle tone all depends on how much you work him/her out! And all horses are born with pretty much the same amount of muscle


Why can horses eat grass and still get big if they are monogastrics?

Horses get fat on grass when they eat too much or it. Grass is the primary food they were designed to eat. It has all the nutrients and calories they need. Overeating makes everyone fat.


What horse breed cannot eat grass?

All horses can eat grass


What type of grass do horses like and grows quickly?

They like all kinds of grass.


How many hours do horses eat for?

Most horses eat almost all day if their in a pasture with grass but if they have foundered, old age, or sick they might not eat as much as usual if any at all.


Will Johnson grass hurt a horse?

No, it shouldn't. My horses eat it all the time. It is just grass, it will not hurt them at all.


What is the best grass for horses to eat that are in a paddock all day?

There is no type of grass, but short-medium length is good. That's what my horse eats when they are in their paddock all day. Just make sure that there is not much, if not none of the lush, long grass and especially no freshly mowed grass, as that causes colic. Hope this helped :)


Can horses eat soybean fodder?

Yes. This is a good feed for horses. Although it is no match for good green grass. Horses do well on all sorts of fodder but love the green grass.


Can you give horses grass clippings?

No you can't because horses are grazing all the time throughout the day, and only eating small amounts at a time. So when you give them grass cuttings they are eating far much more grass as when they are grazing so their digestive system can't handle all the grass at one time, and it will most probably give them colic, and then they may die.


What do brown horses prey on?

All horses are herbivores, or vegetarians...which mean they only eat plants, mainly grass. Horses do not eat meat.


What kinds of hay do horses eat?

They can eat all kinds of hay. Alfalfa, grass,oat,pea, these are all good fodder for horses.