If you mean the Hungarian Half-bred than you can find them in Mexico, near Diez Coronas in Nuevo Paraiso.
You must finish all the Undead challenges in order to get the Chupacabra
You unlock it once you reach a certain level in multiplayer or you can buy it in the Armadillo gun shop in singleplayer mode.
the model horse company called Breyer has many spirit, stallion of the cimarron collection horses-
they are found all over the place near armadillo in around there
It is mostly found in the Gaptooth Ridge area, but can also be found a lot in Rio Bravo. The easiest way to find it is to buy a Survivor Map and go out there. You will find Desert Sage and another flower.( Forgot that flowers name =D )
in mexico
You need to go to Game Marketplace. Find Red Dead Redemption. Then there should be a DLC list.
You find them all around the map
Gaptooth ridge
at fort mercer
youtube
ha you noob....play the game and find out
She comes by randomly, there is no certain place you can find her.
South of the border, in Nuevo Paraiso.
i find most hooded wagons in gaptooth ridge
if you are talking about treasure maps, they are used to find treasure...
in gaptooth breatch and el materdora