The society hastaken a new direction towards a respectable relationship with the animals anda more conscious breeding, use for food, sports and company. The domesticationand the use of horses by people have caused wrong feeding management, whichis mainly due to reduced knowledge on feeding behavior. The pastures are theappropriate environment to horses feeding, but it is a complex system whichinterferes on the horse's decision while it is grazing. The appropriate horse'sfeeding management depends on the comprehension of their behavior patterns.As the sward is heterogeneous and the plants' structure vary in height, density,types of leaves, stems and reproductive parts, the horses select the sward.This selection allows them to ingest some important nutrients, vital for theirmaintenance and development. Stocking rate and grazing time, both results ofhorse management in stables, limit their selectivity. The forages supply nutrientsand prevent clinical disorders and behavior stereotypic. Inputs of researchesabout pasture use are able to show the importance of horses' relationship withenvironment and the need of appropriate management can provide a better lifequality for horses.