Herring (Czech: Herynk) is a horse in Kingdom Come: Deliverance II.
Near the beginning of the main quest, Back in the Saddle, Otto von Bergow will offer this horse as a gift to Henry. However, you can turn it down if you prefer your current horse.
If you ride Herring enough (about 50 kilometers) you will gain a Horsemanship perk "Red Herring" which increases Herring's stats, similar to Pebbles.