It's the smell that gets to many neighbors of the park. It smells like hay. They are annoying. The carriage drivers defend the horses' scent. People who said that, they don't know anything about the horses.
Drivers face revocation of their licenses for repeated offenses.
When there is rain and snow, nobody comes out. So it is the time that the horse can relax. So far, New York has taken the position that the horse carriages are a tourist draw, even in the face of continuing complaints. And some neighbors on the park agree. The horses bring people to the neighborhood and to my restaurant.