Fore legs at the front and two at the back?
Sorry I believe the answer is never.
A horse fly has approximately 6 legs on their body. Horse flies are larger than other species of flies.
6
A horse and rider
Horse, sheep, are two examples.
a mutant... or a genetically modified organism...
The back legs of a horse is called its hind legs.
No. A quadraped has four legs. A horse has SIX legs. Two legs in the back, and fore legs in the front.
The function of a horse's legs is both movement and support.
a horse is a *quadruped. meaning walks on four legs. =]
a dead horse
All grass hoppers have six legs.
It is doubtful that a horse will ever have six legs. It may happen through a malformation or mutation but it is unlikely.