Why do horses run?

Question

my little sister asked me that and she really wants to know so can somebody give me a answer so she can quit buging me

Answer 1

for the same reasons that we walk

Answer 2

Becuz their butt stinks so much,so they run fast to get a way from that ****

Answer 3

To get some exerise!~!!

Answer 4

Because there's usually a 4 foot person ontop whipping the cr*p out of them

Answer 5

To go faster.