Your people are nomads and rely heavily on livestock that can be moved as seasons and resources dictate. Most nomads use mounted or use beasts of burden to transport belongings. Nomads organise along family group lines and families stick together.
Poor: very low income. compared to many. He usually does not or cannot own property. His home is usually of lesser quality, sometimes due to uncaring landlords who may also be the Poor person's employer.
While foraging or hunting for food, you have an encounter with a trapped predatory beast. Instead of slaying it, you free it. The freed beast disappears. Later, you are trapped by a falling log. The same beast reappears, aiding and freeing you.
Social. A social enemy might be a personal rival, an idealogy, or a cultural trait. Its an enemy tied to interactions with others, they may have trouble fitting in, be a social outcast, not identify with their culture, or be wanted but their own kind.