Purchase several stalls from Choco Bill (no less than three), and then begin hunting for a Chocobo. As you probably know by now, Chocobo's can be found anywhere there are Chocobo tracks on the landscape. What you may not know is each track yields Chocobo's of different qualities. To breed the best you need to find the best here is a list of different areas and the type of Chocobo's you can find in each.

You can capture Chocobo's four at a time, but then you'll need to return to the Chocobo ranch and choose who the keepers are. Choco Billy will always give you a recommendation. Use the list below to help you determine what type of Chocobo you have by interpreting Choco Billys comments.

Once you have a selection of quality Chocobo's, you will want to feed and train them. Chocobo's eat greens that can be found in the wild or purchased from Chocobo Billy and the Chocobo Sage. Greens raise one or several of a Chocobo's stats. These Stats include...

Higher quality greens provide more of a increase than cheaper greens, But they cost more. You can expect to feed some Chocobo's as much as 500,000 Gil worth of greens. Check out the various greens and what they do.

Greens List
Green	Price	+Speed	+Intellect	+Stamina
Gyshal	100	No	No	Yes
Krakka	250	No	Yes	No
Tantal	400	Yes	Yes	Yes
Pahsana	800	No	Yes	No
Curiel	1000	Yes	No	Yes
Mimett	1500	Yes	No	Yes

If you feed a Chocobo a greens the it fails to raise that statistic, You've maxed that particular greens effects. You can also use a green to make a Chocobo stay around in battles for longer. The better the green the longer it catches the Chocobo's attention.
Chocobo's also eat nuts, but only when they are breeding. You should never need to purchase a nut. It is mainly because the only nuts you should ever need are the Zeio Nut and the Carbo Nut, bothof which are used to breed special Chocobo's, but neither of which can be purchased.
After maxing out your Chocobo's stats, you should race them before trying to breed them. Racing Chocobo and raising their classes helps to make sure that Chocobo's off-spring will be champion material. Two S class Chocobo's will have a far better chance of breeding a special Chocobo than two C class Chocobo's.

Once you have a male and a female Chocobo that has been properly trained, you are ready to create a special Chocobo.

At a one time, there were two extinct types of Chocobo roaming the planet: The Mountain-Chocobo and the River-Chocobo. The Mountain-Chocobo was a green tinted bird with the ability to cross-mountains. The River-Chocobo was a blue bird that could cross any shallow body of water. Remember that there are some parts of the planet that cannot be reached by conventional means. On the other hand, the right type of Chocobo can cross anything. These would sure come in handy, But no one seems to know how these two are bred.

There is a guy named Chocobo sage, whom no one has seen in years. It was thought that he either moved away to some far away land, or just disappeared. However it is known that he lives on the northern continent deep within the mountain ranges. You can ask him for some Regen greens but you'll need an airship to reach has cabin. You can also ask him about breeding Mountain and River-Chocobo. He may even be able to tell you about the black Chocobo. Make sure you revisit him from time to time. When you find him, let Choco Billy's daughter, Chole, know and she will keep track of any information that he may give you.

To get mountain-Chocobo (Green), or River-Chocobo (Blue) you need to mate a great or a good Chocobo, using a Carob nut. You can't buy the Carob nut from a shop; instead you need to steal if from the ferocious Vlakorados that roams the wood near bone village. You can also increase your chances of breeding a special Chocobo if the Parents are both S class racers.

The Mountain-and-River (black) Chocobo is created when mountain-Chocobo (Green), and River-Chocobo (Blue) mate using a carob nut. Again it's not absolute, but you can increase your chances of getting a black Chocobo by training the mother and father hard.

Once you have the black Chocobo you can attempt to breed the ultimate Chocobo. These gold Chocobo's can go absolutely anywhere. Te can even reach that island to the island to the northeast of the Chocobo ranch. Have the black Chocobo mate with a wonderful Chocobo and feed them a Zeio Nut. These nuts are the rarest of all the nuts. They can only be found on the small island to the north of the Chocobo Ranch. Note, however, that there are creatures in the woods known as goblins. You should be able to steal the Zeio Nut from them during battle.