Advantages

Extrapolating on the chicken resemblance, we can surmise that a chocobo-like mount would have several advantages over a horse:

• Size - standing on just two feet, a chocobo takes up half the room.
  
• Temperament - horses are notoriously angry creatures, whilst chickens are, by and large, nothing other than laid-back (and occasionally flustered).
• Softness - anyone who has picked up a chicken will be aware that it is like picking up a cloud. Riding a chocobo to work, you could be mistaken for thinking you were still in bed. Comparatively, horses are like rib cages wrapped in sheathes of hardened muscle and gristle. Nobody has ever made a pillow or a tickling stick out of a horse.
  
• Free food - a chicken will periodically produce free food. A chocobo will periodically produce giant free food.

Chocobo - Chicken

Physiology, chocobos most greatly resemble chickens, only big.

This would be a good place to start.

Because we can do better than horses

Mankind needs a horse alternative.

With oil prices on the rise, more and more of us are considering switching to riding horses to work. But is it really feasible in the modern world?

The short answer: no.

The long answer: no, but chocobos could be.

The only thing standing in the way of their widespread acceptance as a viable means of transport is the fact that they do not exist yet.

I intend to change that.

I will make chocobos a reality.