Rock-Tilder were a breed of Tilder found in the Trog Ravines. Like the more commonly farmed Tilder, Rock Tilder was also made into Tildersteaks, Tilder Sausages and the female Tilder gave milk. They were one of the few signs of life in the Trog Ravines. It was described to move by picking its self up and down slopes and sometimes "like a shaggy-winged vulpoon" it would circle the sky looking for carrion. It was mentioned in The Slaughterer's Quest.