When Keiara Wade rides her horse, Penny, she thinks of her younger brother, who was murdered when he was 23. “My brother thought that being a man meant being in a gang,” she said. Wade, who grew up in Compton, south of downtown Los Angeles, found solace at Richland Farms, a working horse ranch improbably nestled in the heart of the city. The ranch takes in horses that have been abandoned or abused. “You feel just the way I feel,” Wade remembered thinking about the quarter horse she rides. “You…