Did tyrannosaurs care for their young?  They must have to some degree because a juvenile probably would not have been capable of feeding itself. Still, no one knows for sure. Did tyrannosaurs sit on their nests the way other dinosaurs, such as oviraptors, did?  Was there every an egg strong enough to support the weight of a 12,000 pound mother?  Not a single tyrannosaur egg or embryo has ever been found. 
    Some scientists believe that tyrannosaurs were solitary animals.  Others believe the hunted in packs.