Vasila

The character described by P. M. Shpilevsky in the article "Belarusian folk legends". 

Looks like a man with horse ears and hooves, wears human clothes. The creature lives in a stable, where it takes care of the breeding of horses, protects from diseases, protects at night in the pasture from attacks of predatory animals and evil spirits.

Modern folklore researchers consider the creature to be an author's fiction.