Horse teeth age will have between 36 and 44 teeth. All equines are heterodontous, which means that they have different shaped teeth for different purposes. All horses have twelve incisors at the front of the mouth, used primarily for cutting food, most often grass, whilst grazing. They are also used as part of a horse's attack or defence against predators, or as part of establishing social hierarchy within the herd. Immediately behind the front incisors is the interdental space, where no teeth grow from the gums. This is where the bit is placed, if used, when horses are ridden. Behind the interdental
River of Teeth America’s history." In October 2017, Tor Books released "Taste of Marrow", which follows the characters of "River of Teeth" in the months following the events of that book. River of Teeth River of Teeth is a 2017 alternate history novella by Sarah Gailey. It was first published by Tor Books. In the 1850s, James Buchanan approved a plan to import hippopotamuses into the United States as livestock. Decades later, the lawless swamps of Louisiana are infested with murderous feral hippos, and Winslow Houndstooth and his band of misfits are hired to clear them out. "River of Teeth" was a finalist