fullpacforkids

both are almost wrong about lore problem read
But by the 2170's, horses had long been extinct in the American wastelands. Although there are rumors that horses have been seen in scattered records and that they are still present in southern Central America.
Also, certain species have been created by radiation, while romantics refer to them as 'Unicorns' many people know them by there earthier descriptions of 'Knobheads'.
Both types of horses have retained their pre-War characteristics of speed, strength, and versatility. They are a multifarious species in that they can be used to scout and to make war, for food and hide and to pull heavy loads such as caravans. In this, they are near if not more useful than brahmin.
Adaptions
The horses that survived and adapted after the Great War became leaner and tougher and able to survive on almost anything; they have also become more surefooted which is necessary because of the rocky landscape they often have to traverse. In general, horses are still similar to their pre-War cousins but have less hair, and have grown in size.