What is horses suck?

Horses do not suck in the literal sense, as they are not capable of creating suction with their mouths. However, they do use their mouths to suck in air while eating and drinking. Horses have a strong sucking reflex that allows them to graze on grass and drink water. They use their lips and tongue to collect food and water, then draw it into their mouths using a vacuum-like motion. This process is vital to their survival, as horses are herbivores that require a constant intake of food and water to maintain their health and energy.