Rock Creature

Ogron eaters were large orange blob-like creatures native to the Ogrons' home world. They preyed upon Ogrons, yet were worshipped by them reverently. One account described Ogron eaters as similar in appearance to the Earth Tyrannosaurus rex. (DWN: ''Doctor Who and the Space War)

During a human/Draconian expedition to the planet, the Third Doctor saw one of the creatures eat one of the Ogrons that were attacking them. (DW: Frontier in Space)