That's how God made them.
*edit* Well, yes, but they need four legs to keep them balanced.
*edit2* yea Liz is right :) they need 4 legs to keep balanced and they are mammals and most mammals have 4 legs.
It stands on four legs, unless one of the legs is hurt in which case he would lift that leg off the ground and stand on 3 legs.
That's like asking why do humans have two legs, why do dogs have four legs, etc. There really is no explanation or reason that scientists may have as to why other than "genetics" or "DNA".
He has 4 legs.
yes a horse has 4 legs... quad = 4
93 Horses and 36 cows. ( 3 legs / cow * x cow + 4 legs / horse * y horse = 480 legs and 1 head / cow * x cow + 1 head / horse * y horse = 129 are two equations in two unknowns, which can easily be solved )
a meerkat moves on it 's 4 legs and can also stand on it's hind legs
Three legs are more stable than 4 legs.
28 horses multiplied by 4 legs each horse equal 112 legs 28 * 4 = 112
A very nosy horse.
Horse, sheep, are two examples.
A horse has 4 legs and 1 head. That is that 1 horse represents 5 of 25 legs and heads.So we can say that there are 5 horses (25÷5).
Shouldn't be to hard to find a horse in your car, it is a big animal with 4 legs.
Maybe, it could probably stand on its to legs only if it built up its muscle. There was a dog who could stand on its two hind legs, so maybe a panda could too.
A person riding a horse.